The 2021 edition of the International Plumbing Code, as published
by the International Code Council, Inc., as hereinafter amended, including
appendices C, D, E, and F is hereby adopted as the plumbing code of
the City of Lubbock, Texas. A copy of said plumbing code is attached
hereto and incorporated herein as though set out herein in detail.
References to the plumbing code in this chapter shall mean the 2021
edition of the International Plumbing Code. One copy of the 2021 International
Plumbing Code shall be filed with the city secretary and a copy shall
be maintained in the office of the city building official. All such
copies, with the amendments thereto, shall be open to public inspection
during the usual hours of business of the offices where they are maintained.
(1983 Code, sec. 6-81; Ordinance
2002-O0106, sec. 1, adopted 10/24/2002; Ordinance 2009-O0033, sec. 2,
adopted 4/27/2009; Ordinance
2011-O0104, sec. 1, adopted 11/3/2011; Ordinance 2016-O0073 adopted 5/12/16; Ordinance 2020-O0017 adopted 2/11/2020; Ordinance 2024-O0026 adopted 3/26/2024)
The administrative provisions contained in chapter
28, articles
28.01 through
28.08 of this Code of Ordinances are applicable to this article; however, for purposes of administering provisions related more specifically to the regulation of plumbing systems installation, these supplemental administrative provisions have been provided. Except as amended or supplemented within sections
28.10.002,
28.10.003, and
28.10.051 through
28.10.056, the entire text of chapter
1 of the 2021 International Plumbing Code is deemed to be incorporated herein as though set out herein in detail. Where a conflict arises between a provision contained within sections
28.10.002,
28.10.003, and
28.10.051 through
28.10.056 and articles
28.01 through
28.08 of this Code of Ordinances, it is the intent that the more specific shall govern, as determined by the building official.
(1983 Code, sec. 6-82; Ordinance
2009-O0033, sec. 2, adopted 4/27/2009; Ordinance 2011-O0042, sec. 7, adopted 5/31/2011; Ordinance 2011-O0104, sec. 1, adopted 11/3/2011; Ordinance 2016-O0073 adopted 5/12/16; Ordinance 2020-O0017 adopted 2/11/2020; Ordinance
2024-O0026 adopted 3/26/2024)
Administrative amendments and cross-references to articles 28.01 through 28.08. The following administrative provisions within chapter
1 of the International Plumbing Code are hereby stricken, and the corresponding provisions within articles
28.01 through
28.08 of this Code of Ordinances shall govern, as indicated in table 28.10.003 below:
Table 28.10.003
|
---|
Administrative Provisions Cross-Reference
|
---|
2021 International Plumbing Code Section
|
Section Heading/Subject
|
Refer to Lubbock Code of Ordinances Section
|
---|
109.6
|
Fee refunds
|
|
115.4
|
Violation penalties
|
|
116.1
|
Stop work orders
|
|
113
|
Means of appeal
|
|
114
|
Board of appeals
|
|
(1983 Code, secs. 6-83, 6-84; Ordinance 2009-O0033, sec. 2, adopted 4/27/2009; Ordinance 2011-O0042, sec. 8,
adopted 5/31/2011; Ordinance
2011-O0104, sec. 1, adopted 11/3/2011; Ordinance 2016-O0073 adopted 5/12/16; Ordinance 2020-O0017 adopted 2/11/2020; Ordinance 2024-O0026 adopted 3/26/2024)
(a)
Protection against physical damage.
Section 305.6
is hereby amended to read as follows:
305.6 Protection against physical damage. In concealed locations where piping, other than cast iron or galvanized
steel, is installed through holes or notches in studs, joists, rafters
or similar members less than 1.5 inches (38 mm) from the nearest edge
of the member, the pipe shall be protected by steel shield plates.
Such shield plates shall have a thickness of not less than 0.0575
inch (1.463 mm) (No. 16 gage). Such plates shall cover the area of
the pipe where the member is notched or bored.
(b)
Over-excavation.
Section 306.2.1 is hereby amended
to read as follows:
306.2.1 Over-excavation. Where trenches
are excavated below the installation level of the pipe such that the
bottom of the trench does not form the bed for the pipe, the trench
shall be backfilled to the installation level of the bottom of the
pipe placed in layers of 6 inches (152 mm) maximum depth and such
backfill shall be compacted after each placement. The backfill material
may consist of sand or fine gravel, or excavated material that complies
with Section 306.3.
(c)
Drainage and vent water test.
Section 312.2 is
hereby amended to read as follows:
312.2 Drainage and vent water test. A
water test shall be applied to the drainage system either in its entirety
or in sections. If applied to the entire system, all openings in the
piping shall be tightly closed, except the highest opening, and the
system shall be filled with water to point of overflow. If the system
is tested in sections, each opening shall be tightly plugged except
the highest openings of the section under test, and each section shall
be filled with water, but no section shall be tested with less than
a 5-foot (1524 mm) head of water above floor height. In testing successive
sections, at least the upper 10 feet (3048 mm) of the next preceding
section shall be tested so that no joint or pipe in the building,
except the uppermost 10 feet (3048 mm) of the system, shall have been
submitted to a test of less than a 5-foot head of water above floor
height. The water shall be held kept in the system, or in the portion
under test, for at least 15 minutes before inspection starts. The
system shall then be tight at all points.
(d)
Gravity sewer test.
Section 312.6 is hereby amended
to read as follows:
312.6 Gravity sewer test. Gravity sewer tests shall consist of plugging the end of the building sewer at the point of connection with the public sewer, filling the building sewer with
water, testing with not less than a 5-foot (1524 mm) head of water
and maintaining such pressure for 15 minutes.
(e)
Ductless mini-split system traps.
Section 314.2.4.1
is hereby deleted in its entirety.
(f)
Sheet lead.
Section 402.4 is hereby amended to
read as follows:
402.4 Sheet lead. Sheet lead for pans
shall not weigh less than two and one-half (2-1/2) pounds per square
foot (12.2 kg/m2) and shall be coated with
an asphalt paint or other approved coating.
(g)
Sheet lead.
Section 421.5.2.3 is hereby amended
to read as follows:
421.5.2.3 Sheet lead. Sheet lead shall
weigh not less than two and one-half (2-1/2) pounds per square foot
(12.2 kg/m2) and shall be coated with an
asphalt paint or other approved coating. The lead
sheet shall be insulated from conducting substances other than the
connecting drain by 15-pound (6.80 kg) asphalt felt or an equivalent.
Sheet lead shall be joined by burning.
(h)
Water hammer.
Section 604.9 is hereby amended
to read as follows:
604.9 Water hammer. The flow velocity
of the water distribution system shall be controlled to reduce the
possibility of water hammer. An air chamber or a water-hammer arrestor
shall be installed where quick-closing valves are
utilized, unless otherwise approved. Water-hammer
arrestors shall be installed in accordance with the manufacturer's
instructions. Water-hammer arrestors shall conform to ASSE 1010.
(i)
Solvent cementing.
Section 605.21.3 is hereby
amended to read as follows:
605.21.3 Solvent cementing. Joint surfaces
shall be clean and free from moisture. A purple primer that conforms
to ASTM F656 shall be applied. Clear primer in lieu of purple is acceptable
where joints are accessible. Solvent cement not purple in color and
conforming to ASTM D2564 or CSA CAN/CSA-B137.3 shall be applied to
all joint surfaces. The joint shall be made while the cement is wet
and shall be in accordance with ASTM D2855. Solvent-cement joints
shall be permitted above or below ground.
(j)
Location of full-open valves.
Section 606.1 is
hereby amended to read as follows:
606.1 Location of full-open valves. Full-open valves shall be installed in the following locations:
1.
1. On the building water service pipe from the public water
supply.
2.
2. On the water distribution supply pipe at the entrance into
the structure if the water meter is more than 100 feet from the building.
3.
3. On the water supply pipe to a gravity or pressurized water
tank.
4.
4. On the water supply pipe to every water heater.
(k)
Location of shutoff valves.
Section 606.2 is hereby
amended to read as follows:
606.2 Location of shutoff valves. Shutoff
valves shall be installed in the following locations:
1.
1. On the fixture supply to each plumbing fixture in other than
bathtubs and showers in one- and two-family and multiple-family residential occupancies, and other than in individual sleeping units
that are provided with unit shutoff valves in hotels, motels, boarding
houses and similar occupancies.
2.
2. On the water supply pipe to each appliance or mechanical
equipment.
(l)
Slope of horizontal drainage pipe.
Table 704.1
is hereby amended to read as follows:
Table 704.1
|
---|
Slope of Horizontal Drainage Pipe
|
---|
Size
(inches)
|
Minimum slope
(inch per foot)
|
---|
2-1/2 or less
|
1/4a
|
3 to 5
|
1/8a
|
6 or larger
|
1/16a
|
Note:
|
a.
|
Slopes for piping draining to a grease interceptor shall comply
with Section 704.1
|
(m)
Solvent cementing.
Section 705.10.2 is hereby
amended to read as follows:
705.10.2 Solvent cementing. Joint surfaces
shall be clean and free from moisture. A purple primer that conforms
to ASTM F656 shall be applied. Clear primer in lieu of purple primer
is acceptable where joints are accessible. Solvent cement not purple
in color and conforming to ASTM D2564 CSA CAN/CSA-B137.3, CSA CAN/CSA-B181.2
or CSA CAN/CSA-BV182.1 shall be applied to all joint surfaces. The
joint shall be made while the cement is wet and shall be in accordance
with ASTM D2855. Solvent-cement joints shall be permitted above or
below ground.
Exception: A primer is not required where both of the following
conditions apply:
1.
The solvent cement used is third-party certified as conforming
to ASTM D2564.
2.
The solvent cement is used only for joining PVC drain, waste
and vent pipe and fittings in non-pressure applications in sizes up
to and including 4 inches (102 mm) in diameter.
(n)
Installation of fittings.
Section 706.3 is hereby
amended to read as follows:
706.3 Installation of fittings. Fittings
shall be installed to guide sewage and waste in the direction of flow.
Change in direction shall be made by fittings installed in accordance
with Table 706.3. Change in direction by combination fittings, side
inlets or increasers shall be installed in accordance with Table 706.3
based on the pattern of flow created by the fitting. Double sanitary
tee patterns shall not receive the discharge of back-to-back water
closets and fixtures or appliances with pumping action discharge.
(o)
Building drains and sewers.
Table 710.1(1) is
hereby amended to read as follows:
Table 710.1(1)
|
---|
Building Drains and Sewers
|
---|
Diameter of Pipe
(inches)
|
Maximum Number of Drainage Fixture Units Connected to Any Portion
of the Building Drain or the Building Sewer, Including Branches of
the Building Draina
|
---|
Slope per foot
|
---|
1/16 inch
|
1/8 inch
|
1/4 inch
|
1/2 inch
|
---|
1-1/4
|
—
|
—
|
1
|
1
|
1-1/2
|
—
|
—
|
3
|
3
|
2
|
—
|
—
|
21
|
26
|
2-1/2
|
—
|
—
|
24
|
31
|
3
|
—
|
36
|
42
|
50
|
4
|
—
|
180
|
216
|
250
|
5
|
—
|
390
|
480
|
575
|
6
|
620
|
700
|
840
|
1000
|
8
|
1400
|
1600
|
1920
|
2300
|
10
|
2500
|
2900
|
3500
|
4200
|
12
|
3900
|
4600
|
5600
|
6700
|
15
|
7000
|
8300
|
10,000
|
12,000
|
Note:
|
a.
|
The minimum size of any building drain serving a water closet
shall be 3 inches.
|
(p)
Permit requirements.
Section 716.1.1 is hereby
added to read as follows:
716.1.1 Permit requirements. A licensed plumbing contractor shall obtain a permit under this code prior to the work being performed. The permit application shall indicate if work in the City right-of-way will be necessary. If issued, the permit will grant the licensed plumbing contractor temporary "permitted user" status, as contemplated by Chapter
37 of the Lubbock Code of Ordinances, for limited access to the City right-of-way. Excavation in the City right-of-way subjects the permittee to all applicable requirements of Chapter
37 as well as this code, save and except the requirement for a separate right-of-way permit. The limited access is restricted to unpaved areas only and is defined as an excavation that is hand-dug only (no mechanical excavation) and no more than three feet (3') in width adjacent to the property line. The licensed plumbing contractor has the option of hiring a "permitted user," as anticipated by Chapter
37, to perform the work in the public right-of-way.
(q)
Permit requirements.
Section 717.1.1 is hereby
added to read as follows:
717.1.1 Permit requirements. A licensed plumbing contractor shall obtain a permit under this code prior to the work being performed. The permit application shall indicate if work in the City right-of-way will be necessary. If issued, the permit will grant the licensed plumbing contractor temporary "permitted user" status, as contemplated by Chapter
37 of the Lubbock Code of Ordinances, for limited access to the City right-of-way. Excavation in the City right-of-way subjects the permittee to all applicable requirements of Chapter
37 as well as this code, save and except the requirement for a separate right-of-way permit. The limited access is restricted to unpaved areas only and is defined as an excavation that is hand-dug only (no mechanical excavation) and no more than three feet (3') in width adjacent to the property line. The licensed plumbing contractor has the option of hiring a "permitted user," as anticipated by Chapter
37, to perform the work in the public right-of-way.
(r)
Permit requirements.
Section 718.1.1 is hereby
added to read as follows:
718.1.1 Permit requirements. A licensed plumbing contractor shall obtain a permit under this code prior to the work being performed. The permit application shall indicate if work in the City right-of-way will be necessary. If issued, the permit will grant the licensed plumbing contractor temporary "permitted user" status, as contemplated by Chapter
37 of the Lubbock Code of Ordinances, for limited access to the City right-of-way. Excavation in the City right-of-way subjects the permittee to all applicable requirements of Chapter
37 as well as this code, save and except the requirement for a separate right-of-way permit. The limited access is restricted to unpaved areas only and is defined as an excavation that is hand-dug only (no mechanical excavation) and no more than three feet (3') in width adjacent to the property line. The licensed plumbing contractor has the option of hiring a "permitted user," as anticipated by Chapter
37, to perform the work in the public right-of-way.
(s)
Roof extension unprotected.
Section 903.1.1 is
hereby amended to read as follows:
903.1.1 Roof extension unprotected. Open
vent pipes that extend through a roof shall be terminated not less
than 10 inches (254 mm) above the roof.
(t)
1001.1 Scope (traps, interceptors and separators).
Section 1001.1 is hereby amended to read as follows:
1001.1 Scope. This chapter shall govern the material and installation of traps, interceptors and separators. See also divisions 5 and 6 of article
22.04 (wastewater system) of the Lubbock Code of Ordinances.
(u)
Storm drainage-general (tests).
Section 1101.4
is hereby amended to read as follows:
1101.4 Tests. The building storm
drain shall be tested in accordance with Section 312 and
within the building only and shall not require 5-foot head, but roof
drain level only.
(v)
Roof design.
Section 1101.7 is hereby amended
to read as follows:
1101.7 Roof design. Roofs shall be designed
for the maximum possible depth of water that will pond thereon as
determined by the relative levels of roof deck and overflow weirs,
scuppers, edges or serviceable drains in combination with the deflected
structural elements in accordance with Section 1611 of the International
Building Code. In determining the maximum possible depth of water,
all primary roof drainage means shall be assumed to be blocked. The
maximum possible depth of water on the roof shall include the height
of the water required above the inlet of the secondary roof drainage
means to achieve the required flow rate of the secondary drainage
means to accommodate the design rainfall as required by Section 1106.
(w)
Strainers.
A new Section 1105.3 is hereby added
to read as follows:
1105.3 Strainers. Roof drains shall have
strainers extending not less than 4 inches (102 mm) above the surface
of the roof immediately adjacent to the roof drain. Strainers shall
have an available inlet area, above roof level, of not less than one
and one-half times the area of the conductor or leader to which the
drain is connected.
(x)
Flat decks.
A new Section 1105.4 is hereby added
to read as follows:
1105.4 Flat decks. Roof drain strainers
for use on sun decks, parking decks and similar areas that are normally
serviced and maintained shall comply with Section 1105.3 or shall
be of the flat-surface type, installed level with the deck, with an
available inlet area not less than two times the area of the conductor
or leader to which the drain is connected.
(y)
Size of conductors, leaders and storm drains.
Section 1106 is hereby deleted and replaced with the following:
SECTION 1106
|
SIZE OF CONDUCTORS, LEADERS AND STORM DRAINS
|
1106.1 General. The size of the
vertical conductors and leaders, building storm drains, building storm sewers, and any horizontal branches
of such drains or sewers in Lubbock, Texas, shall
be based on a minimum 100-year hourly rainfall rate of 3.3 inches
(84 mm) per hour.
1106.2 Vertical conductors and leaders. Vertical conductors and leaders shall be sized for the maximum projected
roof area, in accordance with Table L1106.2(1) and Table L1106.2(2).
Table L1106.2(1)
|
---|
Size of Circular Vertical Conductors and Leaders
|
---|
Horizontally Projected Roof Area (square feet)
|
---|
Diameter of leader
(inches)a
|
Rainfall Rate (inches per hour)
|
---|
|
3
|
3.3
|
4
|
2
|
960
|
888
|
720
|
3
|
2,930
|
2,711
|
2,200
|
4
|
6,130
|
5,671
|
4,600
|
5
|
11,530
|
10,666
|
8,650
|
6
|
17,995
|
16,647
|
13,500
|
8
|
38,660
|
35,762
|
29,000
|
a.
|
Sizes indicated are the diameter of circular piping. This table
is applicable to piping of other shapes, provided the cross-sectional
shape fully encloses a circle of the diameter indicated in this table.
For rectangular leaders, see Table L1106.2(2). Interpolation is permitted
for pipe sizes that fall between those listed in this table.
|
b.
|
The Rate of Rainfall for Lubbock, Texas, is 3.3 inches per hour, as shown in Appendix B of the 2021 International Plumbing Code.
|
Table L1106.2(2)
|
---|
Size of Rectangular Vertical Conductors and Leaders
|
---|
Dimensions of Common Leader Sizes width x length
(inches)a, b
|
Horizontally Projected Roof Area (square feet)
|
---|
|
Rainfall Rate (inches per hour)
|
|
3
|
3.3
|
4
|
1-3/4 X 2-1/2
|
1,130
|
1,046
|
850
|
2 x 3
|
1,840
|
1,702
|
1,380
|
2-3/4 X 4-1/4
|
4,270
|
3,949
|
3,200
|
3 x 4
|
4,400
|
4,070
|
3,300
|
3-1/2 X 4
|
5,300
|
4,901
|
3,970
|
3-1/2 X 5
|
7,100
|
6,566
|
5,320
|
3-1/4 X 4-3/4
|
7,320
|
6,771
|
5,490
|
3-3/4 X 5-1/4
|
8,500
|
7,864
|
6,380
|
3-1/2 X 6
|
9,260
|
8,564
|
6,940
|
4 x 6
|
10,990
|
10,165
|
8,240
|
5-1/2 X 5-1/2
|
14,760
|
13,653
|
11,070
|
7-1/2 X 7-1/2
|
33,500
|
30,986
|
25,120
|
Notes:
|
---|
a.
|
Sizes indicated are nominal width x length of the opening for
rectangular piping.
|
b.
|
For shapes not included in this table, Equation 11-1 shall be
used to determine the equivalent circular diameter, De, of rectangular
piping for use in interpolation using the data from Table L1106.2(1).
|
De
|
= (width x length) 1/2
|
(Equation 11-1)
|
where:
|
De
|
= equivalent circular diameter; De, width, and length are in
inches.
|
c.
|
The Rate of Rainfall for Lubbock, Texas, is 3.3 inches per hour, as shown in Appendix B of the 2021 International Plumbing Code.
|
1106.3 Building storm drains and sewers. The size of the building storm drain, building storm sewer and their
horizontal branches having a slope of one-half unit or less vertical
in 12 units horizontal (4-percent slope) shall be based on the maximum
projected roof area in accordance with Table L1106.3. The slope of
horizontal branches shall be not less than one-eighth unit vertical
in 12 units horizontal (1-percent slope) unless otherwise approved.
Table L1106.3
|
---|
Size of Horizontal Storm Drainage Piping
|
---|
|
Horizontally Projected Roof Area
(square feet)
|
---|
Size of Horizontal Piping
|
Rainfall Rate (inches per hour)
|
---|
(inches)
|
3
|
3.3
|
4
|
---|
1/8 unit vertical in 12 units horizontal (1 percent slope)
|
3
|
1,096
|
1,014
|
822
|
4
|
2,506
|
2,294
|
1,800
|
5
|
4,453
|
4,119
|
3,340
|
6
|
7,133
|
6,598
|
5,350
|
8
|
15,330
|
14,181
|
11,500
|
10
|
27,600
|
25,530
|
20,700
|
12
|
44,400
|
41,070
|
33,300
|
15
|
72,800
|
68,810
|
59,500
|
1/4 unit vertical in 12 units horizontal (2 percent slope)
|
3
|
1,546
|
1,430
|
1,160
|
4
|
3,533
|
3,268
|
2,650
|
5
|
6,293
|
5,821
|
4,720
|
6
|
10,066
|
9,311
|
7,550
|
8
|
21,733
|
20,103
|
16,300
|
10
|
38,950
|
36,025
|
29,200
|
12
|
62,600
|
57,920
|
47,000
|
15
|
112,000
|
103,600
|
84,000
|
1/2 unit vertical in 12 units horizontal (4 percent slope)
|
3
|
2,295
|
2,100
|
1,644
|
4
|
5,010
|
4,635
|
3,760
|
5
|
8,900
|
8,234
|
6,680
|
6
|
13,700
|
12,800
|
10,700
|
8
|
30,650
|
28,355
|
23,000
|
10
|
55,200
|
51,060
|
41,400
|
12
|
88,800
|
82,140
|
66,600
|
15
|
158,800
|
146,860
|
119,000
|
The rate of rainfall for Lubbock, Texas, is 3.3 inches per hour, as shown in appendix
B of the 2021 International Plumbing Code.
1106.4 Vertical walls. In sizing roof
drains and storm drainage piping, one-half of the area of any vertical
wall that diverts rainwater to the roof shall be added to the projected
roof area for inclusion in calculating the required size of vertical
conductors, leaders and horizontal storm drainage piping.
1106.5 Parapet wall scupper location. Parapet wall roof drainage scupper and overflow scupper location
shall comply with the requirements of Section 1502 of the International
Building Code.
1106.6 Size of roof gutters. The size
of semicircular gutters shall be based on the maximum projected roof
area in accordance with Table L1106.6.
Table L1106.6
|
---|
Size of Semicircular Roof Gutters
|
---|
Horizontally Projected Roof Area
(square feet)
|
---|
Diameter of Gutters
|
Rainfall Rate
(Inches per hour)
|
---|
(inches)
|
3
|
3.3
|
4
|
---|
1/16 unit vertical in 12 units horizontal (0.5 percent
slope)
|
3
|
226
|
209
|
170
|
4
|
480
|
444
|
360
|
5
|
834
|
771
|
625
|
6
|
1,280
|
1,184
|
960
|
7
|
1,840
|
1,702
|
1,380
|
8
|
2,655
|
2,456
|
1,990
|
10
|
4,800
|
4,440
|
3,600
|
1/8 unit vertical in 12 units horizontal (1 percent slope)
|
3
|
320
|
296
|
240
|
4
|
681
|
630
|
510
|
5
|
1,172
|
1,084
|
880
|
6
|
1,815
|
1,679
|
1,360
|
7
|
2,600
|
2,405
|
1,950
|
8
|
3,740
|
3,458
|
2,800
|
10
|
6,800
|
6,290
|
5,100
|
1/4 unit vertical in 12 units horizontal (2 percent slope)
|
3
|
454
|
420
|
340
|
4
|
960
|
888
|
720
|
5
|
1,668
|
1,543
|
1,250
|
6
|
2,560
|
2,368
|
1,920
|
7
|
3,860
|
3,530
|
2,760
|
8
|
5,310
|
4,911
|
3,980
|
10
|
9,600
|
8,880
|
7,200
|
1/2 unit vertical in 12 units horizontal (4 percent slope)
|
3
|
640
|
592
|
480
|
4
|
1,360
|
1,258
|
1,020
|
5
|
2,360
|
2,183
|
1,770
|
6
|
3,695
|
3,418
|
2,770
|
7
|
5,200
|
4,810
|
3,900
|
8
|
7,460
|
6,902
|
5,600
|
10
|
13,330
|
12,331
|
10,000
|
The rate of rain fall for Lubbock, Texas, is 3.3 inches per hour, as shown in appendix
B of the 2021 International Plumbing Code.
(z)
Secondary (emergency) roof drains.
Section 1108
is hereby deleted and replaced with the following:
SECTION 1108
|
SECONDARY (EMERGENCY) ROOF DRAINS
|
1108.1 Secondary (emergency overflow) drains
or scuppers. Where roof drains are required, secondary
(emergency overflow) roof drains or scuppers shall be provided where
the roof perimeter construction extends above the roof in such a manner
that water will be entrapped if the primary drains allow buildup for
any reason.
1108.2 Separate systems required. Secondary
roof drain systems shall have the end point of discharge separate
from the primary system. Discharge shall be above grade, in a location
that would normally be observed by the building occupants or maintenance
personnel.
1108.3 Sizing of secondary drains. Secondary
(emergency) roof drain systems shall be sized in accordance with Section
1106 based on the rainfall rate for which the primary system is sized
in Tables L1106.2(1), L1106.2(2), L1106.3 and L1106.6. Scuppers shall
be sized to prevent the depth of ponding water from exceeding that
for which the roof was designed as determined by Section 1101.7. Scuppers
shall be sized in accordance with Tables L1108.3(1) and L1108.3(2)
so that the rain load on the roof does not exceed 20 psf. Notify the
structural engineer when the roof and wall areas contributing to the
scuppers exceed the values shown in Table L1108.3(2) so that the structure
can be designed for increased rain load. Scuppers shall have an opening
dimension of not less than 4 inches (102 mm). The flow through the
primary system shall not be considered when sizing the secondary roof
drain system.
Table L1108.3(1)
|
---|
Size of Scuppers
|
---|
Length of Scupper, L (inches)
|
---|
|
|
5"
|
6"
|
8"
|
10"
|
12"
|
18"
|
24"
|
30"
|
36"
|
---|
Head, H
|
4"
|
|
|
|
|
|
|
|
|
|
---|
(inches)
|
|
Capacity of Scupper, Q (gallons per minute)
|
---|
1"
|
11.4
|
14.4
|
17.4
|
23.4
|
29.4
|
35.4
|
53.3
|
71.3
|
89.3
|
107.3
|
1.846"
|
27.3
|
34.8
|
42.3
|
57.3
|
72.4
|
87.4
|
132.5
|
177.6
|
222.7
|
267.7
|
2"
|
30.5
|
39.0
|
47.5
|
64.4
|
81.4
|
98.3
|
149.1
|
200.0
|
250.8
|
301.7
|
Note: The Table is based on the Francis weir formula:
|
Q = 3.33 x (L - 0.2 x H) x H1.5
|
Where:
|
Q
|
=
|
Flow Rate (cubic feet per second)
|
L
|
=
|
Length of Scupper Opening (feet)
|
H
|
=
|
Head on Scupper (feet, measured 6 feet back from opening)
|
Table L1108.3(2)
|
---|
Maximum Contributing Areas for Parapet Wall Scuppers
|
---|
For This Table: ds = 2", I = 3.3 in./hr., and Rain Load, R =
20 psf
|
---|
Width of Scupper, L
(inches)
|
Maximum Contributing Roof and Wall Areas, A
(square feet)
|
---|
4"
|
796
|
5"
|
1015
|
6"
|
1234
|
7"
|
1453
|
8"
|
1673
|
10"
|
2111
|
12"
|
2549
|
16"
|
3426
|
24"
|
5179
|
Notes:
|
---|
A = Maximum allowable horizontally-projected roof areas plus
one-half of the vertical wall areas contributing to the roof drainage
area so that the maximum rain load on the roof, R, does not exceed
20 psf.
|
ds = Depth of rainwater from the primary roof drain up to the
bottom of the scupper inlet (also referred to as static head), inches.
For this Table: ds = 2".
|
H = Maximum depth of additional rainwater above the bottom of
the scupper inlet (also referred to as Hydraulic Head), inches. For
this Table: H = 1.846" maximum.
|
(H = 20 psf/5.2 psf/in. of thickness
|
Ds = 3.846" -2" = 1.846")
|
i = The rate of rainfall for Lubbock, Texas is 3.3 inches per hour, as shown in Appendix B of the 2021 IPC. The rate of rainfall is based on a storm of one hour duration and a 100 year return period.
|
Q = 3.33 x (L
|
0.2 x H) x H1.5 A = Q/i
|
Q = Flow rate through the scupper, gallons per minute (gpm)
|
Note: the minimum scupper height shall be 4". Scupper heights
greater than 4" do not change the values in the table.
|
(aa) Combined sanitary and storm public sewer.
>Section 1109
is hereby deleted in its entirety.
(bb) Medical gas certification.
Section 1202 is hereby amended
by adding a new Section 1202.2, as follows:
1202.2 Certification required. A medical
gas certification must be furnished to the building inspection department
before a final inspection will be approved.
(1983 Code, secs. 6-86–6-99G; Ordinance 2009-O0033, sec. 2, adopted 4/27/2009; Ordinance 2011-O0104, sec. 1,
adopted 11/3/2011; Ordinance
2016-O0073 adopted 5/12/16; Ordinance 2020-O0017 adopted 2/11/2020; Ordinance 2024-O0026 adopted 3/26/2024)
For the purposes of section
28.10.052, section
28.10.053 and section
28.10.054 of the Code of Ordinances of the City of Lubbock, and section 312.9 and section 608 of the 2021 International Plumbing Code, sections P2503.7 and P2902 of the 2021 International Residential Code, and the USC Manual of Cross-Connection Control, American Water Works Association M14 Manual, the following definitions shall apply. In the event of a conflict between the definitions set forth below and the definitions provided in the 2021 International Plumbing, 2021 International Residential Codes, the USC Manual of Cross-Connection Control, American Water Works Association M14 Manual, for the purposes of sections
28.10.052,
28.10.053 and
28.10.054 of the Code of Ordinances of the city, the definitions set forth below shall control.
Air gap.
The unobstructed vertical distance through the free atmosphere
between the lowest opening from any pipe or faucet conveying water
to a tank, fixture, receptor, sink, or other assembly and the flood
level rim of the receptable. The vertical, physical separation must
be at least twice the diameter of the water supply outlet, but never
less than 1.0 inch. An air gap may also be a horizontal space between
two pipes at no less than 6.0 inches.
Approved.
Accepted by the authority responsible as meeting an applicable specification stated or cited in sections
28.10.051,
28.10.053, and
28.10.054 or as suitable for the proposed use.
Auxiliary water supply.
Any water supply on or available to the premises other than
the purveyor's approved public water supply that presents a potential
contamination hazard of the public water system. These auxiliary waters
may include water from another purveyor's public water supply
or any natural source(s) such as a well, spring, river or stream or
used waters, or industrial fluids. These waters may be contaminated
or polluted or they may be objectionable and constitute an unacceptable
water source over which the water purveyor does not have sanitary
control.
Backflow.
The undesirable reversal of flow in a public water distribution
system as a result of a cross connection.
Backflow prevention assembly test and maintenance report.
The report required for each backflow prevention assembly
upon initial installation and periodically thereafter as required,
giving evidence that the backflow prevention assembly has been properly
selected based on the degree of hazard, and has been properly installed
and tested in accordance with applicable standards, and showing the
results of this test. The completed form will be forwarded to the
water purveyor for documentation and annual recordkeeping.
Backpressure.
Pressure created by any means in the water distribution system,
which by being in excess of the pressure in the water supply mains
causes a potential backflow condition.
Backsiphonage.
The backflow of potentially contaminated water into the potable
water system as a result of the pressure in the potable water system
falling below atmospheric pressure of the plumbing fixtures, pools,
tanks or vats connected to the potable water distribution piping.
Building official.
The officer charged with the enforcement of the building, plumbing, mechanical, electrical, fuel gas, and energy conservation codes of the city, or his duly authorized representative. For purposes of sections
28.10.051,
28.10.053, and
28.10.054, all state-licensed plumbing inspectors under the supervision of the building official are his duly authorized representatives.
Bypass arrangements.
Any jumper connections, removable section, unions, swivels
or change-over devices and other temporary or permanent devices through
which or because of which backflow can occur.
Contamination.
An impairment of the quality of the potable water that creates
an actual hazard to the public health through poisoning or through
the spread of disease by sewage, industrial fluids or waste.
Cross connection.
A physical connection or bypass arrangement between a public
water system and either another supply of unknown or questionable
quality, or another source that may contain contaminating or polluting
substances, any source of water treated to a lesser degree in the
treatment process, or any steam, gas or chemical system.
Cross connections – controlled.
A connection between a public water system and a nonpublic
water system with an approved backflow prevention assembly properly
installed and maintained so that it will continuously afford the protection
commensurate with the degree of hazard.
Cross-connection control by containment.
The installation of an approved backflow prevention assembly
at the water service connection to any customer's premises, where
it is physically or economically unfeasible to find and permanently
eliminate or control all cross connections or potential contamination
hazards, within the customer's water system; or it shall mean
the installation of an approved backflow prevention assembly on the
service line leading to and supplying a portion of a customer's
water system where there are cross connections or potential contamination
hazards, that cannot be effectively eliminated or controlled at the
point of the cross connection.
Cross-connection control device.
Any nationally approved or recognized device placed upon
any connection, physical or otherwise, between a potable water supply
system and any plumbing fixture or any tank, receptacle, equipment
or device, which is designed to prevent nonpotable, used, unclean,
polluted and contaminated water, or other substance, from entering
into any part of such potable water system under any condition or
set of conditions.
Customer/property owner.
The owner, as determined by the real property records of Lubbock County, Texas, or the agent of the owner in responsible charge of the subject premises. For purposes of sections
28.10.051,
28.10.053, and
28.10.054,
a licensed plumber and/or irrigator shall be deemed to be an agent of the owner when performing work under the scope of sections
28.10.051,
28.10.053, and
28.10.054 pursuant to a plumbing and/or irrigation permit.
Customer service inspection.
An inspection designed to detect any actual or potential
point of contamination of the potable water system and/or cross-connection
hazards.
Degree of hazard.
The nonhealth hazard or health hazard classification that
shall be attached to all actual or potential cross connections.
(1)
Nonhealth hazard. — A cross connection or potential cross
connection involving any substance that generally would not be a health
hazard but would constitute a nuisance or be aesthetically objectionable,
if introduced into a public water supply.
(2)
Health hazard. — The classification assigned to a cross
connection or potential contamination hazard or other situation involving
any substance that can cause illness, death, spread of disease or
has a high probability of causing such effects if introduced into
the potable drinking water supply.
Fireline tester.
A tester who is qualified to test backflow prevention assemblies
on firelines. This person must be licensed by TCEQ and registered
with the city.
Licensed professional.
Any individual, or their representative, that must maintain
a license obtained through a professional licensing board in order
to conduct their business under state law.
Point of use isolation.
The appropriate backflow prevention within the consumer's
water system at the point at which the actual or potential cross connection
exists.
Pollution.
An impairment of the quality of the potable water to a degree
that does not create a hazard to the public health but that does adversely
and unreasonably affect the aesthetic qualities of such potable water
for domestic use.
Potable water.
Water free from impurities present in amounts sufficient
to cause disease or harmful physiological effects and conforming to
the bacteriological and chemical quality requirements of the Public
Health Service Drinking Water Standards or the regulations of any
public health authority having jurisdiction over such matters.
Potential contamination hazard.
A condition which, by its location, piping or configuration,
has a reasonable probability of being used incorrectly, through carelessness,
ignorance, or negligence, to create or cause to be created a backflow
condition by which contamination can be introduced into the public
water supply. Examples of potential contamination hazards are:
(3)
Removable sections or spools; and
(4)
Swivel or changeover assemblies.
Repair of an irrigation system.
The reconstruction or renewal of any part of an existing
irrigation system, including without limitation, installation of a
backflow prevention device, adding additional irrigation zones, reparation
of a main irrigation line and valve replacement. For the purpose hereof,
the replacement of a control box or sprinkler head(s) shall not be
deemed to be a repair.
Service connection.
The point of delivery where the water purveyor loses control
over the water.
Used water.
Any water supplied by a water purveyor from a public water
system to a consumer's water system after it has passed through
the point of delivery or service connection and is no longer under
the sanitary control of the water purveyor.
Water purveyor.
The director in charge of the water department of the city, who is vested with the authority and responsibility for the implementation of an effective cross-connection control program and for the enforcement of the provisions of sections
28.10.051,
28.10.053, and
28.10.054.
(1983 Code, sec. 6-85; Ordinance
2009-O0033, sec. 2, adopted 4/27/2009; Ordinance 2011-O0104, sec. 1, adopted 11/3/2011; Ordinance 2016-O0073 adopted 5/12/16; Ordinance
2020-O0017 adopted 2/11/2020; Ordinance 2024-O0026 adopted 3/26/2024)
Section
28.10.052, section
28.10.053, and section
28.10.054 of the Code of Ordinances of the city are intended to supplement the USC Manual of Cross-Connection Control, American Water Works Association M14 Manual, section 312.9, "Inspection and Testing of Backflow Prevention Assemblies," and section 608, "Protection of Potable Water Supply" of the 2021 International Plumbing Code, as well as sections P2503.7 and P2902 of the 2021 International Residential Code, both codes having been previously adopted as a part of the Code of Ordinances of the city. In the event of any conflict between the USC Manual of Cross-Connection Control, American Water Works Association M14 Manual, sections 312.9 or 608 of the 2021 International Plumbing Code or sections P2503.7 or P2902 of the 2021 International Residential Code and section
28.10.052, section
28.10.053, and section
28.10.054 of the Code of Ordinances of the city, the provisions of section
28.10.052, section
28.10.053, and section
28.10.054 of the Code of Ordinances of the city shall control. Section
28.10.052, section
28.10.053, and section
28.10.054 of the Code of Ordinances of the city shall be liberally construed to protect the public health and safety of the citizens of the city.
(1983 Code, sec. 6-100.1; Ordinance 2005-O0001, sec. 3, adopted 1/27/2005; Ordinance 2007-O0056, sec. 3,
adopted 6/14/2007; Ordinance
2009-O0033, sec. 3, adopted 4/27/2009; Ordinance 2011-O0104, sec. 1, adopted 11/3/2011; Ordinance 2016-O0073 adopted 5/12/16; Ordinance
2020-O0017 adopted 2/11/2020; Ordinance 2024-O0026 adopted 3/26/2024)
(a)
Responsibilities of water purveyor.
(1)
General regulations:
(A) No water service connection to any premises shall be installed or maintained by the water purveyor unless the water supply is protected as required by state law, including without limitation, 30 TAC 290.44(h), 30 TAC 290.46(j), 30 TAC 290.47(i), 30 TAC 344.73 and 30 TAC 344.75, as same may be amended from time to time. Service of water, subject to the provisions of sections
28.10.052,
28.10.053, or
28.10.054 of the Code of Ordinances of the City of Lubbock, or sections 312.9 or 608 of the 2021 International Plumbing Code, or sections P2503.7 or P2902 of the 2021 International Residential Code, as applicable, to any premises shall be discontinued by the water purveyor if a backflow prevention assembly required by sections
28.10.051,
28.10.053, and
28.10.054 is not installed properly, tested and maintained, or if it is found that a backflow prevention assembly has been removed, bypassed, or if an unprotected cross connection exists on the premises. Service will not be restored until such conditions or defects are corrected.
(B) For new facilities, permanent water service shall
not be provided until all testable backflow prevention assemblies
have been tested and are operational. Except in cases where the testing
of backflow prevention assemblies must be delayed until the installation
of internal production or auxiliary equipment, the city shall not
approve any certificate of occupancy until all backflow prevention
assemblies have been tested and are operational.
(2)
Customer service inspection:
(A) A customer service inspection for cross-connection
control shall be completed by the city water purveyor prior to providing
continuous water service in each of the following circumstances:
(i) Water service to a newly constructed facility,
in which case the customer service inspection shall be performed in
conjunction with or near the same time as the plumbing final inspection
conducted by the building official.
(ii) Any correction, addition or improvement to the
water service or water distribution plumbing of any facility or premises,
except for minor repair and maintenance work exempted from permitting
by section 106.2 of the 2021 International Plumbing Code, or in cases
where an approved RPBA backflow prevention device has been installed
at the point of water service connection such that premises'
isolation is achieved, and said device has been verified as having
been properly tested and maintained as provided herein. Where nonexempt
plumbing work has been performed upon the water service or water distribution
plumbing of any facility or premises, and approved premises isolation
has been provided as described herein, the building official shall
be solely responsible for ensuring compliance of any such work on
the customer side of the backflow device.
(B) A permanent water service shall not be established
with regard to a newly constructed facility until after the customer
service inspection is completed.
(C) Temporary water service, for construction or other
purposes, that is found to pose a potential cross-connection threat
to the potable water due to the unknown use of the water therefor,
or other reasons or causes, shall be protected by an approved backflow
prevention assembly.
(3)
If, in the judgment of the water purveyor or building official
an approved backflow prevention assembly is required at the customer's/property
owner's water service connection; or, within the customer's/property
owner's private water system for the safety of the public water
system, the water purveyor or the designated agent shall:
(A) Give notice in writing to the customer/property
owner to install an approved backflow prevention assembly(s) at specific
location(s) at his/her expense, and depending on the severity of the
threat to the public water supply, within the time frame required
by the city and in all instances within thirty (30) days.
(B) In the case of any premises where, in the opinion
of the water purveyor and/or building official, an imminent health
threat is posed due to cross connection or a potential contamination
hazard, water service to the facility may immediately be discontinued
without prior written notice to customer/property owner. Although
the city will attempt to provide notice as is reasonably practical,
no notice shall be required prior to discontinuance.
(4)
Failure, refusal or inability on the part of the customer/property owner to install, have tested and maintain the backflow prevention assembly(s) shall be grounds for discontinuing water service to the premises until such requirements have been met as required by sections
28.10.051,
28.10.053, and
28.10.054.
(5)
Any reduction in water pressure caused by the installation of
backflow prevention assembly devices shall not be the responsibility
of the city.
(b)
Responsibilities of the customer/property owner.
The customer's/property owner's system shall include those
parts of the potable water conveyance facilities beyond the termination
of the utility distribution system that are conveying potable water
to the points of use of customer/property owner.
(1)
Backflow prevention assemblies shall be installed within the customer's/property owner's system at the customer's/property owner's expense at any time required by sections
28.10.052,
28.10.053, or
28.10.054 of the Code of Ordinances of the city and/or sections 312.9 or 608 of the 2021 International Plumbing Code, or sections P2503.7 or P2902 of the 2021 International Residential Code, or the USC Manual of Cross-Connection Control, American Water Works Association M14 Manual, as applicable. All backflow prevention devices must be installed and tested as required by:
(B) Section 312.9 and section 608 of the 2021 International
Plumbing Code; and
(C) 30 TAC 290.44(h), 30 TAC 290.46(j) and 30 TAC 290.47(i).
(2)
It shall be the responsibility of the customer/property owner to verify that all applicable city plumbing and/or irrigation permits are obtained and that the customer/property owner, or licensed plumber or irrigator, as applicable, is in compliance with all of the provisions of those permits. In addition to the remedies provided herein, in the event the backflow prevention assembly is installed by a licensed professional, failure by such licensed professional to follow the provisions of such permit will result in written notice to the applicable state licensing agency, in addition to being a violation of sections
28.10.051,
28.10.053, and
28.10.054.
(3)
It shall be the responsibility of the customer/property owner
and backflow prevention assembly tester performing the subject test(s)
to send to the city the backflow prevention assembly test and maintenance
records. These materials shall be delivered to the water purveyor
office of the city within ten (10) days of installation of the backflow
prevention assembly.
(4)
The customer's/property owner's system shall be open for inspection at all reasonable times to authorized representatives of the city to determine whether cross connections or potential contamination hazards, including violations of sections
28.10.052,
28.10.053, or
28.10.054 of the Code of Ordinances of the city and/or sections 312.9 or 608 of the 2021 International Plumbing Code, or sections P2503.7 or P2902 of the 2021 International Residential Code, as applicable, exist.
(5)
If the customer or premises wherein potable water from the city is supplied or provided has access to an auxiliary water supply that is treated to a lesser degree than the public water supply or if the water quality is unknown, and which is either cross connected or poses a potential contamination hazard to the public water system, the public water system shall be protected against backflow or backsiphonage by an approved backflow prevention device or a horizontal air gap (physical separation) as defined in section
28.10.051. The described threat shall be deemed a health hazard when determining the type of approved backflow required. If the auxiliary water supply is used for irrigation purposes, the backflow assembly shall be subject to the requirements of state laws, as same may be amended from time to time.
(A) In order for a customer to install an auxiliary
water supply on property located within City of Lubbock's incorporated
limits, the auxiliary water supply must be registered with the city.
The registration shall be approved if the auxiliary water supply meets
all federal, state, and local requirements.
(B) If the customer does not install a backflow prevention
device, the following requirements must be met:
(i) The customer shall permit the city to perform a
customer service inspection to determine whether a horizontal air
gap exists between the two systems and no other potential contamination
hazards exist.
(ii) If a potential contamination hazard exists, the
customer shall install an approved backflow prevention device to protect
the public water system.
(iii) If a potential contamination hazard is not documented
during the customer service inspection, no backflow prevention device
shall be required. However, the city shall require the customer, at
the customer's expense, to obtain a customer service inspection
at a minimum of at least every three years to confirm that the two
separate systems have not been cross-connected and other potential
contamination hazards have not been created.
(C) Any customer who creates a cross-connection and does not comply with the backflow protection ordinances in this subsection
(5) shall be subject to receiving a citation and their city water service being discontinued until a backflow protection device has been installed at the premises.
(6)
In the event industrial fluids, any material dangerous to health
or any other objectionable substances are handled in such a fashion
as to create potential contamination hazard to the public water system,
such condition shall be deemed a health hazard. The public water system
shall be protected against backflow from the premises by installing
an air gap, a reduced pressure principle backflow assembly, or such
other backflow assembly device as may be required by 30 TAC 290.47(i),
as same may be amended from time to time. See attachment A, to Ordinance
2007-O0056 incorporated herein and made a part hereof for all purposes.
(7)
All new installations of or substantial alterations to fire suppression systems that utilize the city's public water supply shall have installed a U.L. approved backflow prevention device according to the degree of hazard that exists. For purposes of this section, a "substantial alteration" is deemed to be any alteration or expansion of the system that would trigger a requirement for review and approval by the authority having jurisdiction, normally being the city fire marshal. All fireline backflow prevention assemblies must be installed inside the building as determined by section
28.10.053 of the Code of Ordinances of the city. Upon the approved installation of the backflow prevention assembly, a cross-connection test report completed by a licensed fireline tester must be provided to the city as required by subsection
(b)(3), above.
(8)
Subject to the conditions of this subsection
(b)(8),
a reduced pressure assembly shall be the minimum protection for fire hydrant water meters which are being used for a temporary water supply during construction or other uses which may pose a potential contamination hazard to the public water supply. Only city fire hydrant water meters with approved backflow prevention assemblies are allowed to be used within the city limits. Failure to comply with this subsection
(b)(8) will result in the fire hydrant meter being removed from the premises by the water purveyor.
(9)
It shall be the duty of the customer/property owner at any premises where backflow prevention assemblies are installed to have certified inspections and operational tests made upon installation and at least once every three years in nonhealth hazard conditions. In those instances where the water purveyor and/or building official of the city deems the potential backflow to be a health hazard or a potential health hazard, certified inspections shall be required annually or at more frequent intervals as deemed necessary by the water purveyor. All inspections and tests of backflow prevention assemblies shall be at the expense of the customer/property owner and shall be performed by a backflow tester who is licensed with the Texas Commission on Environmental Quality and registered with the water purveyor and meeting all conditions and criteria of section
28.10.052, section
28.10.053, and section
28.10.054 of the Code of Ordinances of the city.
(10)
It shall be the responsibility of the customer/property owner
that all irrigation systems installed after the effective date hereof
and for an existing system in the event of a repair, shall have installed
an approved backflow prevention assembly other than an atmospheric
vacuum breaker (AVB), in the event an existing irrigation system is
repaired.
(11)
It shall be the responsibility of the customer/property owner to have the backflow prevention assembly device tested as described in sections
28.10.051,
28.10.053, and
28.10.054. The backflow prevention assembly shall be repaired, overhauled, or replaced at the expense of the customer/property owner whenever said assemblies are found to be defective. Water service shall not be restored until repairs are complete.
(c)
Responsibilities of the backflow prevention assembly tester.
In addition to requirements of the backflow prevention assembly
tester set forth in other parts of this division, the backflow prevention
assembly tester shall also comply with the following:
(1)
The backflow prevention assembly tester shall perform competent
tests, issuing complete, accurate and legible reports of backflow
prevention assemblies tested, and filing backflow prevention assembly
test and maintenance reports as prescribed by this division. Test
reports shall be submitted to the water purveyor office of the city,
within (10) ten days of the testing by the backflow prevention assembly
tester of the installation, replacement, or repair of the backflow
assembly.
(2)
Prior to performing any testing of backflow prevention assemblies
within the city, a licensed backflow prevention assembly tester must
be registered annually with the city in accordance with this section.
(A) Eligibility for registration shall be conditioned
upon applicant providing proof to the city that they are currently
licensed as a backflow prevention assembly tester by the Texas Commission
on Environmental Quality.
(B) Each applicant for registration shall furnish evidence
to the city to show that he/she has available the necessary tools
and equipment to properly test and certify such assemblies. Serial
numbers of all test gauges shall be registered with the city annually
and shall be listed on tests and maintenance reports prior to being
submitted to the city. Each recorded test kit shall be tested annually
for accuracy and calibrated to maintain a two-percent accuracy factor.
(3)
In the event the city has reason to believe that testing or
reporting deficiencies exist in a backflow prevention assembly tester's
methods or report, the city shall notify the tester and customer/property
owner, and shall take one or more of the following actions:
(A) Require the subject customer/property owner to
have retested any backflow prevention assembly previously reported
as operational;
(B) In the event the backflow prevention assembly tester
has committed three (3) or more inadvertent testing or reporting inaccuracies
within a twelve-month period commencing with the first inaccuracy,
the backflow prevention assembly tester's registration with the
city may be suspended for a period of six (6) months;
(C) In the event the backflow prevention assembly tester
shall file with the city an intentional or knowing falsified test
report, the backflow prevention assembly tester's registration
with the city shall be revoked by the city.
(1983 Code, sec. 6-100.2; Ordinance 2005-O0001, sec. 4, adopted 1/27/2005; Ordinance 2007-O0056, sec. 4,
adopted 6/14/2007; Ordinance
2009-O0033, sec. 4, adopted 4/27/2009; Ordinance 2011-O0104, sec. 1, adopted 11/3/2011; Ordinance 2016-O0073 adopted 5/12/16; Ordinance
2017-O0143 adopted 11/2/17; Ordinance 2020-O0017 adopted 2/11/2020; Ordinance 2024-O0026 adopted 3/26/2024)
(a)
Any backflow prevention assembly required by sections
28.10.052,
28.10.053, or
28.10.054 of the Code of Ordinances of the city, or section 312.9 or 608 of the 2021 International Plumbing Code, or sections P2503.7 or P2902 of the 2021 International Residential Code, or the USC Manual of Cross-Connection Control, American Water Works Association M14 Manual, as applicable, shall be of a model and size approved by the water purveyor/building official or as approved by 30 TAC 290.47(i), as same may be amended from time to time. Backflow prevention devices must be approved by the city prior to installation. A plumbing permit is required in accordance with section
28.05.001 of this chapter. The city shall determine the type and location of the backflow prevention assembly to be installed within the area served by the public water system.
(b)
The term "approved backflow prevention assembly" shall mean
a backflow prevention assembly that has been manufactured and installed
in full conformance with the standards specified within the 2021 International
Plumbing Code and those established by the American Water Works Association
(AWWA) and the USC Manual of Cross-Connection Control, American Water
Works Association M14 Manual, titled:
AWWA C510 Standard for Double Check Valve Backflow-Prevention
Assembly, and AWWA C511 Standard for Reduced-Pressure Backflow-Prevention
Assembly, and have met completely the laboratory field performance
specifications of the Foundation for Cross-Connection Control and
Hydraulic Research (FCCHR) and the University of Southern California
(USC), "Specification of Backflow-Prevention Assemblies" - Section
10 of the most current issue of the Manual of Cross-Connection Control.
(c)
Backflow prevention assemblies shall be installed in a manner
designed to facilitate ease of testing and inspection by the city
or any certified general tester. All backflow prevention assemblies
shall be tested upon installation, relocation, or repair of same.
(d)
Backflow prevention assemblies, in addition to other requirements set forth in sections
28.10.052,
28.10.053, or
28.10.054 of the Code of Ordinances of the city, or section 312.9 or 608 of the 2021 International Plumbing Code, sections P2503.7 or P2902 of the 2021 International Residential Code, or the USC Manual of Cross-Connection Control, American Water Works Association M14 Manual, shall be installed in accordance with subsections (1) through (9) below. The clearance standards set forth in subsections (1) through (9), below, shall apply to all assemblies installed in enclosures and meter boxes.
(1)
Backflow prevention assemblies that are larger than four inches
and installed more than five feet above floor level must have a suitable
platform for use by testing or maintenance personnel.
(2)
All backflow prevention assemblies installed eight feet or higher
above floor level must have installed a suitable permanent ladder
for use by testing or maintenance personnel.
(3)
All backflow prevention assembly enclosures shall be designed
for ready access and sized to allow for the minimum clearance as established
in this article. Removable protective enclosures may be installed
on smaller assemblies.
(4)
Reduced pressure zone assemblies two inches and smaller shall
have at least a six-inch clearance on both ends and on top of the
assembly. Additionally, there shall be twelve inches of clearance
below the relief valve and twelve inches of clearance on the test
cock side of the assembly. All assemblies larger than two inches shall
have a minimum of twelve inches of clearance on the back side, twenty-four
inches of clearance on the test cock side, and the relief valve opening
shall be at least twelve inches plus nominal size of assembly above
the floor or highest possible water level.
(5)
Double check valve assemblies larger than two inches may be
installed above finished grade in a freeze-proof enclosure or below
grade in a vault. If assembly is installed below grade, the test cocks
must be plugged with corrosion resistant watertight plugs, and shall
be no less than twelve inches below grade with a minimum of twelve
inches clearance below the backflow assembly device. There shall be
at least a six-inch clearance on both ends of the assembly with a
minimum clearance of twelve inches on the back side and twenty-four
inches on the test cock side. The top of the vault shall be two inches
above ground level. Double check valve assemblies shall be installed
so that the checks are horizontal.
(6)
Double check valve assemblies two inches and smaller may be
installed above finished grade in a freeze-proof enclosure or below
grade in a box. If assembly is installed below grade, the test cocks
must be plugged with corrosion resistant watertight plugs, and shall
be no less than twelve inches below grade with a minimum of twelve
inches clearance below the backflow assembly device. There shall be
at least a six-inch clearance on both ends of the assembly with a
minimum clearance of twelve inches on the back side and twelve inches
on the test cock side. The top of the box shall be two inches above
ground level. Double check valve assemblies shall be installed so
that the checks are horizontal.
(7)
Bypass arrangements are prohibited. Pipefittings which could
reasonably be calculated to constitute a means by which a backflow
assembly could be bypassed and defeated shall not be installed.
(8)
All facilities that require continuous, uninterrupted water
service and are required to have a backflow assembly must make provision
for the parallel installation of assemblies of the same type so that
testing, repair and maintenance can be performed.
(9)
All health hazard facilities shall have containment from the
city's potable water system. For the purposes of this subsection,
"containment" shall mean protection of the public water supply at
the service connection.
(1983 Code, sec. 6-100.3; Ordinance 2005-O0001, sec. 5, adopted 1/27/2005; Ordinance 2007-O0056, sec. 5,
adopted 6/14/2007; Ordinance
2009-O0033, sec. 5, adopted 4/27/2009; Ordinance 2011-O0104, sec. 1, adopted 11/3/2011; Ordinance 2016-O0073 adopted 5/12/16; Ordinance
2020-O0017 adopted 2/11/2020; Ordinance 2024-O0026 adopted 3/26/2024)
The mechanism for appeal from the provisions of this division, or from a decision of an administrative official enforcing same, shall be through the building board of appeals of the city in the same manner as set forth in section
2.03.501 of this code. It is further provided that said board shall have no authority to waive, set aside or alter any provision of this division otherwise mandated by the laws of the state.
(Ordinance 2007-O0056, sec. 6, adopted 6/14/2007; Ordinance 2011-O0104, sec. 1, adopted 11/3/2011; Ordinance 2016-O0073 adopted 5/12/16; Ordinance 2020-O0017 adopted 2/11/2020; Ordinance
2024-O0026 adopted 3/26/2024)
Violation of any provision of this division shall be deemed a misdemeanor punishable as provided in section
1.01.004 of the Code of Ordinances of the city. Additionally, a violation of any provision of this division shall be deemed to be a nuisance as defined under section
34.02.031 of the Code of Ordinances of the city. Notwithstanding the above, in the event a violation results in an imminent risk to human health, safety or welfare, the city may immediately discontinue water service to the subject facility without notice. Notwithstanding the right to immediately discontinue water service without notice, as described herein, the city will attempt to provide notice as is reasonably practical under the circumstances presented. The city will provide customer with necessary information to properly reinstate service.
(Ordinance 2007-O0056, sec. 7, adopted 6/14/2007; Ordinance 2011-O0104, sec. 1, adopted 11/3/2011; Ordinance 2016-O0073 adopted 5/12/16; Ordinance 2020-O0017 adopted 2/11/2020; Ordinance
2024-O0026 adopted 3/26/2024)