A.
All pipe for water mains six inches through 12 inches
in diameter shall be polyvinylchloride (PVC) plastic pipe. All plastic pipe
shall be furnished in twenty-foot nominal laying lengths.
B.
All PVC pipe shall be manufactured and supplied in complete
conformance with ANSI/ASTM D 2241-78. Polyvinylchloride pipe classification
shall be SDR26,PVC 1120.
C.
All pipe shall have joints in complete conformance with
the manufacturer's recommendations. The pipe manufacturer shall furnish the
required joint material.
D.
All PVC pipe for hydrant connections, minimum size six
inches in diameter, shall conform to the same specifications as given previously
for main line PVC pipe, except that hydrant connection pipe shall have mechanical
joints in complete conformance with ANSI/AWWA C111/A21.11-80. The pipe manufacturer
shall furnish the required joint accessories.
E.
All pipe fittings shall be short body in complete conformance
with ANSI/AWWA C1110-82. All fittings shall have a minimum pressure rating
of 250 psi.
F.
All pipe and fittings must be NSF or UL approved.
[Amended 3-19-1997 by L.L. No. 5-1997]
A.
All gate valves and valve boxes for water mains six inches
through 12 inches in diameter, including those for hydrant connections and
for water services larger than two inches in diameter, shall meet the same
specifications. All such gate valves three inches through 12 inches shall
conform to ANSI/AWWA C500-80 and shall be suitable for a minimum working pressure
of 200 psi after having been hydrostatically tested to 400 psi after manufacture.
All valves shall open left with a standard two-inch square operating nut.
All valves shall be furnished with mechanical joint ends complete with ductile
iron glands, high-strength low-alloy steel tee bolts and nuts, lead-tipped
plain-backed rubber gaskets and required joint lubricant.
B.
All gate valves three inches through eight inches shall
be double disc, iron body, bronze-mounted, nonrising stem and shall be furnished
with double O-ring packings or as approved by the Town of Milton Engineer.
[Amended 3-19-1997 by L.L. No. 5-1997]
C.
All twelve-inch gate valves shall be furnished with bevel
gearing and grease case, bronze rollers, bronze tracks, square operating nut,
conventional stuffing box packing and any additional accessories necessary
for proper operation in a buried valved box. A bypass and bypass valve are
not required on twelve-inch gate valves.
D.
All valves boxes shall be of cast iron, telescopic pattern
and at least 5 1/4 inches in diameter. Valve boxes for valves three inches
through eight inches shall generally have a twenty-six-inch top section and
a thirty-six-inch bottom section. Valve boxes for twelve-inch bevel geared
valves can generally also have a twenty-six-inch top section and thirty-six-inch
bottom section, but in all cases all valve boxes shall be furnished to match
the specific valve dimensions (and gear case dimensions if applicable) and
trench depth involved.
E.
All valve boxes shall be furnished with a cast-iron cover,
drop style, with bolts, and the word "water" and an arrow indicating the direction
of the valve opening (open left) cast on the cover in raised characters. Valve
boxes shall be Clow F-2452 Model 664-A with a F-2490 cover, or an approved
equal.
F.
Gate valve and valve box installation shall conform to
the requirements on Sheet 1 of the Standard Detail Sheets.[1] All hydrant leads shall incorporate a gate valve which, in general,
shall be located as far from the hydrant and as close to the main as possible.
Gate valves at main line functions shall be located four feet away, measured
center of the valve to center of the junction or fitting. Gate valves on ductile
iron water services shall generally be located on the street line or property
line or where required by the Town of Milton. All gate valve locations shall
be reviewed and approved by the Town of Milton prior to valve installation
and preferably during the design of the system. Tops of the valve boxes shall
be set flush with grade in paved areas and set one inch above grade in grassed
areas.
[1]
Editor's Note: Said sheets are on file in the Town offices.
All water services shall be equipped with backwater valves, whether
installed in the building service before the meter or after the meter, but
before any subsequent interior pipe branches or fixture units, and be of a
type approved by the Town of Milton Engineer.
A.
All fire hydrants shall conform to ANSI/AWWA C502-80
with five-inch minimum main valve openings and six-inch minimum mechanical
joint inlet connections furnished complete with ductile iron glands, high-strength
low-alloy steel tee bolts and nuts, lead-tipped plain-backed rubber gaskets
and required joint lubricant. Hydrants shall be suitable for a five-foot-deep
trench. Each hydrant shall have two two-and-one-half-inch hose connections
and one five-inch Stortz pumper connection, with Stortz cap and chain. All
hydrants shall have double O-ring packing and shall open left with a National
Standard five-sided operating nut measuring 1 1/2 inches flat to point.
The outlet nozzle cap nuts shall be the same as the operating nut
[Amended 10-27-2003 by L.L. No. 5-2003]
B.
All fire hydrants shall be of break flange construction
with a frangible break flange located slightly above the ground line and a
cast-iron break coupling on the stem at the same location, which shall be
so designed that, in case of breakage, only the frangible break flange and
cast-iron coupling need be replaced to complete repair.
C.
All hydrants shall receive a finish coat of paint above
the ground line after installation. Paint shall be weather resistant Sherwin
Williams enamel, or an approved equal. Hydrants shall be painted red (including
operating nut) with white tip cover and nozzle caps. All hydrants shall be
furnished completely shop primed or painted in the same color and pattern
as that required above for the finish coat of paint. Shop primer or paint
shall be chosen so as to be compatible with the type of finish paint specified
above.
D.
All fire hydrants shall be Eddy 2000 or 2500 or Mueller
Centurion or equal.
E.
Hydrant installation shall conform to the requirements
on Sheet 1 of the Standard Detail Sheets.[1] The type of hydrant installation shall be installed truly vertical
at the locations set by the Town of Milton Engineer and/or Code Enforcement
Officer and shall be carefully plumbed before the connection is made. Hydrants
shall be set on a solid precast concrete slab at least 12 inches square and
four inches thick. The concrete slab is to be supported by firm undisturbed
material or well consolidated fill. Crushed stone, to a minimum depth and
thickness of 12 inches, shall be placed around the drain up to a level at
least six inches above the drain to provide for hydrant drainage in pervious
soil, such as sand or gravel. In impervious soil, such as clay, a drainage
pit two feet in diameter and three feet deep shall be excavated below each
hydrant and filled completely with crushed stone under and around the bottom
of the hydrant, up to a level at least six inches above the drain. In both
cases, the top of crushed stone shall be completely covered with polyethylene
or building paper to prevent the backfill from sifting down into the crushed-stone
drain. When required by the Town of Milton Engineer and/or Code Enforcement
Officer because of evidence of high groundwater, the hydrant drain opening
shall be plugged to prevent the entrance of groundwater. In this case, no
crushed stone need be placed under the hydrant.
[Amended 3-19-1997 by L.L. No. 5-1997]
[1]
Editor's Note: Said sheets are on file in the Town offices.
F.
All hydrant leads shall include a gate valve located
three feet or more from the hydrant. Separate mechanical restraint shall be
used to secure the hydrant to the valve and then the valve to the main line
tee or other fitting. An anchoring fitting, Clow F-1217 Tee or F-1218 Elbow
with Roto-Ring glands, or approved equal, shall be the standard installation
method used to restrain the hydrant valve to the main. From the valve to the
hydrant various means of hydrant restraint may be required. A mechanical joint
anchoring pipe, Clow F-1216 with Roto-Ring gland, or approved equal, shall
be the normal method of hydrant restraint. Other types of hydrant restraint,
if required by the Code Enforcement Officer, will be used to suit the specific
installation. Retainer glands may be required. Mechanical joint retainer glands
shall be ductile iron Clow F-1058, or approved equal.
[Amended 3-19-1997 by L.L. No. 5-1997]
G.
All hydrant lead-valve assemblies shall be blocked against
movement with solid precast concrete blocks both behind the hydrant and behind
the tee, as shown on Sheet 1 of the Standard Detail Sheets.[2] These blocks shall bear against undisturbed material.
[2]
Editor's Note: Said sheets are on file in the Town offices.
H.
When required by the Town of Milton Engineer and/or Code
Enforcement Officer, hydrant guard posts shall be installed around hydrants
as shown on Sheet 1 of the Standard Detail Sheets.[3] These posts shall consist of a six-inch diameter piece of ductile
iron pipe set vertically plumb four feet in the ground with its tip extending
six inches above the top of the adjacent hydrant. The pipe shall be filled
with crushed stone with the top 12 inches of the pipe neatly capped with concrete.
After installation, the portion of the guard posts above the ground line shall
be painted in alternating six-inch-wide red and white strips, starting with
red on top. Paint shall consist of a double coat of weather resistant enamel
paint matching in type and color the finish paint coat on the hydrant.
[Amended 3-19-1997 by L.L. No. 5-1997]
[3]
Editor's Note: Said sheets are on file in the Town offices.
A.
Water services 3/4, one, 1 1/2 and two inches in
diameter will generally be installed on public property or rights-of-way extending
from the water main to the property or right-of-way line. Refer to Sheet 1
of the Standard Detail Sheets for installation details.[1] The complete three-fourths-through-two-inch water service shall
consist of the tap, corporation stop, branch connection with extra taps and
corporation stops if required, copper service pipe and fittings and curb stop
and box. Taps will generally be provided by Code Enforcement Officer after
the main has been tested, accepted and placed in service. If tapped tees are
used in lieu of taps, the tapped tees shall be supplied by the owner and installed
by the contractor. Copper service pipe shall be run in trenches five feet
depth minimum as measured from finished grade. The curb stop and box shall
generally be located on the property or right-of-way line with the top of
the curb box set one inch above grade in grassed areas and set flush with
grade in concrete sidewalks or paved areas.
[1]
Editor's Note: Said sheets are on file in the Town offices.
B.
Water services larger than two inches in diameter in
any location shall be furnished and installed by the owner completely at his
own expense. For installation details, refer to Sheet 1 of the Standard Detail
Sheets.[2]
(1)
The complete larger-than-two-inch water service shall generally consist of a main line tee or tapping sleeve and valve, ductile iron service pipe and fittings and standard gate valve and valve box. Such ductile iron service pipe and fittings shall meet the same specifications as given previously in Article II for the main line pipe and fittings and shall be installed in a trench five feet deep minimum to provide at least 4 1/2 feet of cover or more over the barrel of the pipe, all as measured from finished grade.
(2)
The standard gate valve and valve box shall generally be located on the property or right-of-way line or where required by the Code Enforcement Officer. The gate valve and valve box shall meet the same specifications as given previously in § 143-11 for main line valves and valve boxes.
(3)
The exact configuration of these water services larger
than two inches in diameter shall be reviewed and approved by the Code Enforcement
Officer prior to their construction.
[Amended 3-19-1997 by L.L. No. 5-1997]
[2]
Editor's Note: Said charts are on file in the Town offices.
C.
Water services of any size on private property shall
be furnished and installed by the owner completely at his own expense. All
such services shall meet all the same material and installation details as
given in these specifications for other water services. Installation details
shall be reviewed and approved by the Code Enforcement Officer before the
service is installed.
[Amended 3-19-1997 by L.L. No. 5-1997]
D.
All water services shall be installed with a backflow
prevention valve as approved by the Town of Milton Engineer.
[Amended 3-19-1997 by L.L. No. 5-1997]
A.
All water services 3/4, one, 1 1/2 and two inches
in diameter shall be made with copper service pipe. All copper service pipe
shall be soft temper Type K seamless copper tubing conforming to ASTM Specification
B88-81 and Federal Specification WWT-799. Copper service pipe shall have the
following dimensions and weights:
|
Nominal Pipe Size
(inches)
|
Outside Diameter
(inches)
|
Weight per Foot
(pounds)
| |
|---|---|---|---|
|
3/4
|
0.875
|
0.641
| |
|
1
|
1.125
|
0.839
| |
|
11/2
|
1.625
|
1.360
| |
|
2
|
2.125
|
2.060
|
|
NOTE: Services exceeding 75 feet in length shall be a minimum one inch
in diameter as measured from the water main.
| |||
B.
Fittings for three-fourths-inch and one-inch copper service
pipe shall have compressor fittings. Three-part unions for copper to copper
shall be Mueller H-15400 or Hays 5615. Other fittings shall be Mueller or
Hays items of the same series, or approved equal.
C.
Fittings for one-and-one-half-inch and two-inch copper
service pipe shall have compression-type connections. Three-part unions for
copper to copper shall be Mueller H-15403 110 Compression Connections or Hays
5615 CF Haystite connections. Other fittings as required shall be Mueller
or Hays items of the same series, or approved equal.
A.
Three-fourths-inch and one-inch corporation stops shall
have compression connections and shall be Mueller H-15000 or Hays 5200, both
with AWWA (Mueller) inlet threads or equal.
[Amended 3-19-1997 by L.L. No. 5-1997]
B.
One-and-one-half-inch and two-inch corporation stops
shall have compression connections and shall be Mueller H-15000, with Mueller
H-15071 110 Compression Connection straight coupling attached, or shall be
Hays 5200 CF with integral Haystite outlet connection. Both corporation stops
have AWWA (Mueller) inlet threads or equal.
[Amended 3-19-1997 by L.L. No. 5-1997]
C.
When tapped tees are used that have iron pipe thread
taps, Mueller H-15025 or Hays 5204 corporation stops with iron pipe inlet
threads may be used for three-fourths-inch and one-inch sizes. For one-and-one-half-inch
and two-inch sizes, Mueller H-15025 corporation stops with iron pipe inlet
threads with Mueller H-15071 110 Compression Connection straight couplings
attached may be used. As an alternate for one-and-one-half-inch and two-inch
services with tapped tees, Hays 5280 Corporation stops with iron pipe inlet
threads with Hays 5600 CF Haystite straight couplings attached may be used
or equal.
[Amended 3-19-1997 by L.L. No. 5-1997]
D.
Whether tapped in or used with tapped tees, corporation
stops shall be installed tilted up at about 15° from horizontal so that
a partial loop can be formed in the copper service pipe to allow for possible
differential movement of the service pipe and main. A minimum of 4 1/2
feet of cover below finished grade shall be maintained over the top of the
partial loop in the copper service pipe.
E.
Multiple corporation stops for use with branch connections
shall be installed 18 inches on center measured along the main and shall be
staggered off-line around the circumference of the main.
F.
Corporation stop taps larger than the maximum tap size
allowable in the main shall not be made. American Water Works Association
(AWWA) and DEPRA (Ductile Iron Pipe Research Association) recommendations
shall be followed. Consideration shall be given minimum pipe wall thickness
required for each tap size to ensure a serviceable threaded connection. Service
conditions should indicate the extent of full-thread engagement necessary.
As a guide, tap size should be limited so that at least three full threads
of the corporation stop are engaged in the pipe wall for ductile iron pipe.
A.
Branch connections shall be Y-type, minimum two-branch
for one-inch inlet and one-and-one-half-inch outlet and minimum three-branch
for one-inch inlet and two-inch outlet. Branch connections shall be two-branch
Mueller H-15340, three-branch Mueller H-15345 or three-branch Hays 5566 (one-inch
inlet to one-and-one-half-inch outlet) or optional four-branch Mueller H-15350
or four-branch Hays 557 (one-inch inlet to two-inch outlet). Mueller H-15071
110 Compression straight couplings shall be used on the outlet end of the
branch connections to provide the required compression connection to the one-and-one-half-inch
and two-inch copper service pipe.
B.
As an alternate, branch connections may be two-branch
Mueller H-15341, three-branch Mueller H-15346 or three-branch Hays 5546 (one-inch
inlet to one-and-one-half-inch outlet) or optional four-branch Mueller H-15351
or four-branch Hays 550 (one-inch inlet to two-inch outlet). Hays 5600 CF
Haystite straight couplings shall be then used on the outlet end of the branch
connections to provide the required compression connection to the one-and-one-half-inch
and two-inch copper service pipe.
A.
Curb stops for three-fourths-inch and one-inch copper
service pipe shall be nondraining Mueller H-15200 or Hays 5045 or equal. The
curb stops shall be set on a solid concrete block. Curb boxes for these curb
stops shall be of the extension type with a stationary rod and arch pattern
base suitable for a five-foot-deep trench and having a one-inch inside diameter
upper section. Curb boxes shall be Mueller H-10314, 5 1/2 feet extended
in length telescoping to 4 1/2 feet, with matching No. 82867 stationary
rods and No. 87081 lids. As an alternate, curb boxes may be Hays 5800, 4 1/2
feet to 5 1/2 feet adjustment, with matching stationary rods and No.
5803 covers or equal.
[Amended 3-19-1997 by L.L. No. 5-1997]
B.
When either these Mueller or Hays curb boxes for three-fourths-inch
and one-inch services are installed in concrete or paved surfaces, cast-iron
curb box sleeves shall be installed to allow freedom of movement of the ground
key lid. Curb box sleeves shall be Mueller H-10342 or Hays 5890.
C.
Curb stops for one-and-one-half-inch and two-inch copper
service pipe shall be nondraining Mueller Mark II Oriseal H-10283 with Mueller
H-15428 110 Compression Connection couplings to provide the required compression
connections. The curb stops shall be set in a cast-iron foot piece, Mueller
H-10399 for one-and-one-half-inch Oriseal stops and Mueller H-10400 for two-inch
Oriseal stops. Curb boxes shall be Mueller H-10386, with one-and-one-fourth-inch
inside diameter upper section, 5 1/2 feet extended length telescoping
to four feet 8 1/2 inches, with matching No. 580565 stationary rods and
No. 580567 lids and plugs. When installed in concrete or paved surfaces these
curb boxes do not require curb box sleeves.
A.
Meters for all water services two inches in diameter
and less must be obtained from the Town of Milton.
(1)
For three-fourths-inch and one-inch services installed
by the Town of Milton on public property or rights-of-way, the five-eighths-inch
by three-fourths-inch or three-fourths-inch by one-inch water meter will be
installed indoors by the Town of Milton or an approved agent.
(2)
For one-and-one-half-inch and two-inch services installed
by the Town of Milton or an approved agent on public property or rights-of-way,
the water meter shall be installed indoors by the owner.
(3)
For all services two inches in diameter or less installed
by the owner of private property, the water meter must also be purchased from
the Town of Milton, at cost, and then shall be installed indoors by the owner.
(4)
In all these cases, the water meters obtained from the
Town of Milton will be Neptune or Badger displacement-type meters, or equal,
frostproof and straight reading in gallons, or an approved equal.
[Amended 3-19-1997 by L.L. No. 5-1997]
B.
All water meters larger than two inches in size shall
be purchased and installed by the owner. The water meters shall be Neptune
or Badger Turbo meters, or equal, straight reading in gallons. Installation
details shall be reviewed and approved by the Town of Milton before the work
is done. All installations larger than two inches shall have a bypass line
of equal size.
A.
In addition to the various miscellaneous installation
requirements given in subsequent sections of this specification, all water
distribution system installation shall be done in accordance with ANSI/AWWA
C600-82 recommendations. Also, all work shall be done in accordance with the
requirements of the Town of Milton Engineer.
B.
Trenches shall be open-cut from the surface, deep enough
to provide a minimum of five feet of cover over the barrel of the pipe from
finished grade.
C.
All pipe and fittings shall be laid on good foundations
trimmed to shape and, where required, secured against settlement, all in a
manner to provide full support for the entire length of pipe. At the joints,
enough width and depth, including bell holes, shall be made to permit proper
jointing. Blocking support of pipe shall not be permitted unless the pipe
is to be laid with a concrete cradle or encasement or inside a tunnel or casing
pipe. When pipe is laid in tunnels or casings, the pipe shall be blocked in
such a manner so as to take the weight off of the bells. Sufficient selected
bedding and backfill shall be placed or other precautions taken to prevent
flotation, movement or damage to the pipe, fittings and coatings.
D.
Standard pipe installation in trench in earth shall conform
to ANSI/AWWA C600-82, Laying Condition Type 2, with the pipe laid on a flat
or slightly shaped natural trench bottom with bell holes and tamped pipe zone
backfill up to the stringline of the pipe. Excavation to grade and backfilling
shall be in accordance with ANSI/AWWA C600-82. When backfilling, satisfactory
excavated material or sand, gravel or other special trench backfill, as required
by the Town of Milton Engineer, shall be used. The backfill shall be brought
by hand or approved mechanical means to a depth of one foot over the pipe
to provide a cushion and prevent movement and damage to the pipe during subsequent
backfilling with equipment.
E.
An alternate pipe installation for trench in earth, when
ordered by the Town of Milton Engineer, shall conform to ANSI/AWWA C600-82,
Laying Condition Type 4, with the pipe bedded in tamped and shaped select
bedding material to a depth of 1/8 of the pipe diameter or a four-inch minimum,
whichever is greater, followed with tamped pipe zone backfill up to the top
of the pipe. This installation method shall be used to secure better support
for the pipe and/or to replace unstable trench bottoms with sound material.
Excavation below grade and select bedding shall be in accordance with Section
3.2 of ANSI/AWWA C600-82. Select bedding material shall consist of compacted
sand, gravel or crushed stone, depending on conditions approved by the Town
of Milton. Backfilling shall be the same as above.
F.
The Standard pipe installation for trench in rock shall
conform to ANSI/AWWA C600-82, Laying Condition Type 4, with the pipe bedded
in tamped and shaped select bedding material to a depth of 1/8 of the pipe
diameter or a four-inch minimum, whichever is greater, followed with tamped
pipe zone backfill up to the top of the pipe. Rock excavation below grade
and select bedding shall be in accordance with Section 3.2 of ANSI/AWWA C600-82.
Ledge rock, boulders and large stones shall be removed to provide a clearance
of at least six inches below and on each side of all pipe (including bells),
valves and fittings. Such excavated rock shall be replaced with select compacted
bedding material, generally sand, gravel or crushed stone, depending on conditions
approved by the Town of Milton. Backfilling shall be the same as above.
G.
All trench excavation and any required sheeting and shoring
shall be done in accordance with the latest revisions of the following codes:
Subpart 23-4, Excavation Operation, of the New York State Department of Labor
Industrial Code Rule 23, and Subpart P, Excavations, Trenching and Shoring,
of the United States Department of Labor Occupational Safety and Health Administration
(OSHA) Regulations for Construction. The more stringent requirement in each
code shall apply.
H.
Proper and suitable tools and equipment for convenient
and proper handling and laying of pipe and fittings shall be used. Great care
shall be taken to prevent entrance of dirt or foreign matter into the pipe
and to prevent damage of pipe lining and coating. Open ends of pipes shall
be kept plugged or bulkheaded during construction.
I.
All material shall be carefully examined for defect,
and no piece shall be laid which is known to be defective. If any material
is defective after being laid, it shall be removed and replaced with a sound
piece, in a satisfactory manner.
J.
Whenever pipes require cutting to fit into other lines,
the work shall be done with approved cutting tools specifically designed to
cut pipe so as to leave a smooth end at right angles to the axis of the pipe.
The cut end shall be ground or filled to a slight taper so as not to damage
rubber gaskets. The spigot ends of pipe shall be installed at the correct
depth in the bells with a rubber gasket and two silicon bronze wedges per
joint.
[Amended 3-19-1997 by L.L. No. 5-1997]
K.
When making plain end connections with a sleeve on twelve-inch
diameter pipe, ends shall butt together or a filler piece or pipe stop shall
be installed between the ends.
L.
In order to be accepted by the Code Enforcement Officer,
all valve boxes and curb boxes shall be clean and set squarely down on the
valve or curb stop, centered and plumb over the wrench nut of the valve or
operating rod of the curb stop and shall not be over extended. All valves
and curb stops shall be suitably marked and adequately protected during construction.
[Amended 3-19-1997 by L.L. No. 5-1997]
M.
Water main/sanitary sewer separation. Water mains shall
be installed at least 10 feet horizontally from any existing or proposed sanitary
sewer. The distance shall be measured from edge to edge. In cases where it
is not practical to maintain a ten-foot separation, the water main may be
installed closer to the sanitary sewer, provided that the water main is laid
in a separate trench or on an undisturbed earth shelf located on one side
of the sanitary sewer at such an elevation that the bottom of the water main
is at least 18 inches above the top of the sanitary sewer. Water mains crossing
sanitary sewers shall be installed to provide a minimum vertical distance
of 18 inches between the outside of the water main and the outside of the
sanitary sewer. This shall apply whether the water main crosses above or below
the sanitary sewer. For all crossings, one full length of water main pipe
shall be located so that each joint shall be as far away as possible from
the sanitary sewer. Special structural support of the water main and sanitary
sewer may be required.
N.
Dust control. In order to control dust conditions during
the water main construction, the contractor shall furnish and apply either
water or calcium chloride. When water is used on streets or roads, it shall
be applied uniformly with a pressure distributor spray bar or by other approved
equipment. When water is used on areas that shall be sodded or seeded later,
it shall be free from acids, oils, salts or any other substances injurious
to plant growth. Calcium chloride shall be in accordance with ASTM Standard
D98-80 and shall be delivered in unopened, waterproof bags. It shall be applied
to unpaved streets, roads, driveways or other areas at such times as directed
by the Town of Milton Engineer. It shall be applied uniformly after the surface
has been thoroughly watered, as specified above.
A.
All plugs, caps, tees, bends and other fittings shall
be provided with concrete thrust blocking to resist test pressures or shall
be prevented from moving by using suitable metal rods or clamps. Refer to
Sheet 2 of the Standard Detail Sheets for typical concrete thrust block details.[1] All concrete shall be tested to be 3,000 psi and shall be placed
around the fittings to completely fill the space between the fittings and
the undisturbed walls of the trench. Concrete shall not overlap any joint
and shall be placed so as not to interfere with removing or installing any
of the jointing hardware.
[1]
Editor's Note: Said sheets are on file in the Town offices.
B.
Other means of thrust restraint utilizing anchoring fittings and retainer glands may be used where appropriate. These thrust restraint options shall be as previously described for use with hydrants in § 143-14 of these specifications and as illustrated on Sheet 1 of the Standard Detail Sheets.[2]
[2]
Editor's Note: Said sheets are on file in the Town offices.
[Amended 3-19-1997 by L.L. No. 5-1997]
Connections to existing systems shall be reviewed and approved on an
individual basis by the Code Enforcement Officer. In general, connections
shall be made with a minimum of or no disruption to water service in the existing
system.
At times when pipe laying is not actually in progress, the open ends
of the pipes shall be closed temporarily with pipe plugs or by other means.
If water is in the trench when work is resumed, the trench shall be dewatered
and the plugs shall not be removed until all danger of water entering the
pipe is past.
[Amended 3-19-1997 by L.L. No. 5-1997]
At the conclusion of the work, the contractor shall thoroughly clean
all new pipes by flushing them with water or other means to remove all dirt,
stones, pieces of wood, etc., which may have entered during the construction
period. If, after this cleaning, any obstructions remain, they shall be removed
to the satisfaction of the Town of Milton Engineer and the Code Enforcement
Officer. Pipes shall be flushed at a rate of 2.5 feet per second (fps) for
a duration suitable to the Town of Milton Engineer and to the Code Enforcement
Officer. The rates of flow required to produce 2.5 feet per second flushing
velocity in different sizes of pipe are as shown in the following table:
|
Pipe Size
(inches)
|
Flow Required to Produce 2.5 fps Velocity
(gallons per minute)
|
Hydrant Opening Required at 40 psi Residual
|
|---|---|---|
|
4
|
100
|
One-2 1/2"
|
|
6
|
220
|
One-2 1/2"
|
|
8
|
390
|
One-2 1/2"
|
|
12
|
880
|
One-2 1/2"
|
A.
Hydrostatic testing shall be done within 72 hours of
conclusion of installation.
B.
Hydrostatic acceptance tests, consisting of a pressure
test and a leakage test, shall be performed on all sections of all water systems
installed after the trench has been backfilled. Hydrostatic presumptive tests
may be performed when the system is partially backfilled to simply check the
work, but acceptance of the system shall be based on hydrostatic tests run
on the finished system after it is completely backfilled. All hydrostatic
tests shall be performed in accordance with Section 4 of ANSI/AWWA C600-82.
C.
For the pressure tests, the system shall be pressure
tested by pressurizing to a minimum of 150 psi, based on the elevation of
the lowest point in the section being tested and corrected to the elevation
of the gauge. Provisions shall be made to relieve air trapped at high points
in the system through adjacent hydrants or through taps and corporation stops
installed for this purpose by the contractor. After this pressure has been
maintained successfully, with further pumping as required, for a period of
at least one hour, the section under test shall be considered to have passed
the pressure test, and leakage tests shall then be performed.
D.
Leakage tests shall be performed under a minimum test
pressure of 150 psi, based on the elevation of the lowest point of the section
being tested and corrected to the elevation of the gauge. The test section
should be limited to a maximum length of about 2,000 feet. The leakage test
duration shall be a minimum of two hours after the leakage rate has stabilized.
E.
The maximum allowable leakage for a two-hour test per
one-thousand-foot length of different sizes and nominal laying lengths of
pipe shall be as shown in the following table:
|
Pipe Size
(inches)
|
Allowable Leakage at 150 psi
(gallons per 2 hours
per 1,000 feet of pipe)
| |
|---|---|---|
|
3
|
0.56
| |
|
4
|
0.74
| |
|
6
|
1.10
| |
|
8
|
1.48
| |
|
12
|
2.20
|
F.
All water for the test shall be furnished and disposed
of by the contractor at his own expense. Source and/or quality of the water
which the contractor proposes to use in testing the lines shall be acceptable
to the Town of Milton Engineer and to the Code Enforcement Officer.
[Amended 3-19-1997 by L.L. No. 5-1997]
A.
All pipes and fittings connected to and forming a portion
of a potable water supply shall be sterilized and flushed in a manner acceptable
to the Town of Milton Engineer and the Code Enforcement Officer. Sterilization
shall be accomplished after the pipe has passed the pressure and leakage tests.
[Amended 3-19-1997 by L.L. No. 5-1997]
B.
Sterilization shall be performed in accordance with ANSI/AWWA
C601-81 (excluding Section 5.1 covering the tablet method). Sterilization
shall be accomplished by applying a chlorine solution that will give a fifty-parts-per-million
chlorine residual throughout the main being disinfected. The chlorine solution
shall remain in the water mains for a minimum period of 24 hours. At the termination
of this period, the chlorine residual shall be a minimum of 25 parts per million
(ppm). If the residual is less than 25 parts per million (ppm), the entire
procedure shall be repeated until a satisfactory value is reached. The chlorine
solution shall be thoroughly flushed out prior to placing the new section
of the main in service until the chlorine residual does not exceed 1.0 parts
per million (ppm). The chlorine solution shall be disposed of in a manner
that will in no detrimental way affect human, fish, plant or animal life.
Certificates of occupancy shall not be issued until chlorination results are
satisfactory.
C.
After the water mains have been flushed with potable
water to the satisfaction of the Town of Milton Engineer and to the Code Enforcement
Officer, samples of water from the mains shall be subject to bacteriological
analysis.
[Amended 3-19-1997 by L.L. No. 5-1997]
D.
The number of samples and their collection points shall
be reviewed with and be acceptable to the Code Enforcement Officer. Also,
the testing laboratory that will do the bacteriological analysis shall be
a laboratory approved by the Town of Milton Engineer. The water samples shall
test bacteriologically safe before the water mains are placed in service.
[Amended 3-19-1997 by L.L. No. 5-1997]
[Amended 3-19-1997 by L.L. No. 5-1997]
A.
Unless specifically approved by the Code Enforcement
Officer, no water distribution system installation and construction shall
take place during the winter months from November 1 through April 1.
[Amended 3-19-1997 by L.L. No. 5-1997]
A.
At the conclusion of the water system installation, the
Town of Milton Engineer shall prepare detailed record maps of the completed
water distribution system. These records maps shall be of a form acceptable
to the Code Enforcement Officer. The Town of Milton Engineer shall furnish
at least three complete sets of twenty-two-by-thirty-four-inch prints of these
record drawings to the Code Enforcement Officer.
B.
Also, at the conclusion of the water system installation,
the Town of Milton Engineer is required to furnish to the Code Enforcement
Officer an engineer's certification stating that the water system is complete
and was installed in accordance with the previously submitted and approved
plans and specifications. The Town of Milton will submit a copy of the Town
of Milton Engineer's certification and a copy of the laboratory bacteriological
analysis to the Saratoga Health Department.
[Amended 3-19-1997 by L.L. No. 5-1997]
A.
All installation and construction of all water mains
and services installed in public or private property that are connected directly
or indirectly within the Town of Milton system shall be subject to the control
of the Code Enforcement Officer.
B.
Operation of all valves and hydrants under pressure shall
be done only by representatives of the Town of Milton or by such responsible
person approved by the Code Enforcement Officer.
C.
The Code Enforcement Officer shall be notified at least
24 hours prior to the start of making connections to the existing systems.
Also, the Code Enforcement Officer shall be notified at least 24 hours prior
to the start of pressure testing, leakage testing and/or sterilization.
D.
The Code Enforcement Officer will not authorize any meter
installations in any subdivision prior to receiving record drawings and certifications.
Minimum working pressure (the pressure under all conditions except fire
flows) for potable water systems within the Town shall be 35 psi.
