The drainage system of each new building and
of new work installed in an existing building shall be separate from
and independent of that of any other building, and every building
shall have an independent connection with a public or private sewer
when available; except that where one building stands in the rear
of another building on an interior lot and no private sewer is available
or can be constructed to the rear building through adjoining alley,
court, yard or driveway, the house drain from the front of the building
may be extended to the rear building and the whole will be considered
as one house drain.
Old house sewers and drains may be used in connection
with new buildings or new plumbing only when they are found, on examination
and test, to conform in all respects to the requirements governing
new sewers or drains as prescribed in this article. If the old work
is found to be defective, the Division of Health shall notify the
owner to make the necessary changes to conform to this chapter.
A.
Each system of piping shall be laid in a separate
trench, provided that drainage trenches may be benched not less than
18 inches for lighter piping. Where a double system of drainage is
installed, the sanitary and surface house sewers or drains may be
laid side by side in one trench.
B.
Tunneling for distances not greater than six feet
is permissible in yards, courts or driveways of any building site.
When pipes are driven, the drive pipe shall be at least one size larger
than pipe to be laid.
C.
All excavations required to be made for the installation
of a house drainage system or any part thereof within the walls of
a building shall be open trench work. All such trenches and tunnels
shall be kept open until the piping has been inspected, tested and
approved.
Whenever possible, all house drains shall be
brought into the building below the basement or cellar floor.
A.
The house sewer beginning three feet outside the building
shall be of cast iron or vitrified clay pipe.
B.
The house drain, when underground, shall be of lead,
brass or cast iron.
C.
The house drain, when above ground, shall be of cast
iron, galvanized wrought iron or steel, lead or brass, approved standards.
D.
The house sewer, when laid in made or filled-in ground,
shall be of vitrified clay pipe, laid on a bed of approved grillage
or concrete, or of cast-iron pipe, American Society for Testing and
Materials approved standards.
No house sewer or underground house drain shall
be laid parallel to or within three feet of any bearing well, which
might be thereby weakened. The house sewer and drains shall be laid
at sufficient depth to protect them from frost.
A.
The required size of sanitary house drains and sanitary
house sewers shall be determined on the basis of the total number
of fixture units drained by them in accordance with the following
table:
|
Sanitary System Only
| |||||
|---|---|---|---|---|---|
|
Fixture Units
|
1/8 inch to 1 foot
(diameter in inches)
|
1/4 inch to 1 foot
(diameter in inches)
|
1/2 inch to 1 foot
(diameter in inches)
|
Number of Water Closets or Equivalent
| |
|
6 to 12
|
4
|
3
|
—
|
1 to 2
| |
|
13 to 24
|
4
|
4
|
3
|
3 to 4
| |
|
25 to 72
|
6
|
5
|
4
|
5 to 12
| |
|
73 to 300
|
8
|
6
|
5
|
13 to 50
| |
|
301 to 720
|
8
|
8
|
6
|
51 to 120
| |
|
721 to 1,080
|
10
|
10
|
8
|
121 to 180
| |
|
1,081 to 1,920
|
12
|
12
|
10
|
181 to 320
| |
B.
The required sizes of stormwater house drains and
house sewers and other lateral storm drains shall be determined on
the basis of the total drained area in horizontal projection in accordance
with the following table:
|
Stormwater System Only
| ||||
|---|---|---|---|---|
|
Number of Square Feet Drained Area
|
1/8 inch to 1 foot
(diameter in inches)
|
1/4 inch to 1 foot
(diameter in inches)
|
1/2 inch to 1 foot
(diameter in inches)
| |
|
Up to 90
|
1 1/2
|
1 1/2
|
1 1/2
| |
|
91 to 400
|
3
|
2
|
2
| |
|
401 to 660
|
3
|
3
|
2
| |
|
661 to 1,200
|
4
|
3
|
3
| |
|
1,201 to 1,800
|
4
|
4
|
3
| |
|
1,801 to 2,500
|
5
|
4
|
4
| |
|
2,501 to 4,100
|
5
|
5
|
4
| |
|
4,101 to 4,600
|
6
|
5
|
5
| |
|
4,601 to 5,300
|
6
|
6
|
5
| |
|
5,301 to 7,500
|
8
|
6
|
6
| |
|
7,501 to 11,100
|
8
|
8
|
6
| |
|
11,101 to 15,700
|
10
|
8
|
8
| |
|
15,701 to 19,500
|
10
|
10
|
8
| |
|
19,501 to 24,800
|
12
|
10
|
8
| |
|
24,801 to 31,000
|
12
|
12
|
10
| |
|
31,001 to 44,000
|
14
|
12
|
10
| |
|
44,001 to 60,000
|
14
|
14
|
12
| |
A.
In all buildings in which the whole or part of the
house drainage and plumbing system thereof lies below the crown level
of the main sewer, sewage or house wastes shall be lifted by approved
artificial means and discharged into the house sewer.
B.
When subsoil catch basins are installed below the
sewer level, automatic water ejectors provided with a ball float attached
to the main water supply shall be used. Such ejectors or any device
raising subsoil water shall discharge into a properly trapped fixture
or into a stormwater drain.
[Amended 12-14-2011 by Ord. No. 3321]
All subhouse sanitary waste flow drains shall
discharge into an airtight sump or receiving tank so located as to
receive the sewage by gravity, from which sump or receiving tank the
sewage shall be lifted and discharged into the house sewer by pumps,
ejectors or any equally efficient method. Such sumps shall be either
automatically discharged or be of sufficient capacity to receive the
house sewage and wastes for not less than 24 hours. Groundwater sumps
shall not be connected to a discharge point connected to the sanitary
sewage collection system.
The soil or vent pipe leading to an ejector
or other appliance for raising sewage or other waste matter to the
street sewer shall, where a water closet or closets are installed,
be provided with a vent pipe not less than four inches in diameter,
and where fixtures other than water closets are installed, the waste
vent pipe shall be the same diameter as the waste pipe.
All motors, air compressors and air tanks shall
be located where they are open for inspection and repair at all times.
The air tanks shall be so proportioned as to be of equal cubical capacity
to the ejectors connected therewith, in which there shall be maintained
an air pressure of not less than two pounds for each foot of height
that the sewage is to be raised.
