Whenever a private sewer is constructed for
the use of one or several buildings, it shall conform to the following
conditions:
A.
Its diameter shall not be greater than the main sewer
with which it connects.
B.
It shall not be carried through any building.
C.
It shall not be laid along any sidewalk, and when
laid under the roadway it shall not occupy the probable line of any
future main sewer.
D.
It shall contain a separate spur for each building.
Outside of buildings where the soil is not of
sufficient solidity for a proper foundation, cylindrical extra-heavy-weight
cast-iron pipe of the best quality shall be used. It shall be laid
on a smooth bottom, with a special groove cut in the bottom of the
trench for each hub (in order to give the pipe a solid bearing throughout
its entire length). The soil shall be well rammed on each side of
the pipe. Such pipes shall be laid with the joints properly caulked
with lead. The spigot end and hub ends shall be concentric.
Every house or building shall be separately
and independently connected with the street sewer, or main drain on
a private alley, and every house shall be separately vented.
A.
The drainage and plumbing 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, except as provided
below, and every building shall have an independent connection with
a public or private sewer when available.
B.
Exception. 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 an 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 chapter. If the old work
is found defective, the Division shall notify the owner to make the
necessary changes to conform with this chapter.
When a public sanitary sewer is not available,
drainpipes from buildings shall be connected with approved individual
sewage disposal systems in accordance with the requirements of other
regulations of the Division of Health applicable thereto.
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 excavation 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 trenchwork. 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 buildings below the basement or cellar floor.
No house sewer or underground house drain or
any portion thereof shall be laid within three feet of any bearing
wall. The house sewer and drain 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
| ||||
|---|---|---|---|---|
|
Slope Diameter
(inches)
| ||||
|
No. of Fixture Units
|
1/8 inch to 1 foot
|
1/4 inch to 1 foot
|
1/2 inch to 1 foot
|
Number of Water Closets or Equivalent
|
|
6 - 12
|
4
|
3
|
1 - 2
| |
|
13 - 24
|
4
|
4
|
3
|
3 - 4
|
|
25 - 72
|
6
|
5
|
5 - 12
| |
|
73 - 300
|
8
|
6
|
5
|
13 - 50
|
|
301 - 720
|
8
|
8
|
6
|
51 - 120
|
|
721 - 1,080
|
10
|
10
|
8
|
121 - 180
|
|
1,081 - 1,920
|
12
|
12
|
10
|
181 - 329
|
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:
|
Size of House Drain and Sewer For Stormwater
Only
| |||
|---|---|---|---|
|
Slope Diameter
(inches)
| |||
|
Drained Area
(square feet)
|
1/8 inch to 1 foot
|
1/4 inch to 1 foot
|
1/2 inch to 1 foot
|
|
90 or less
|
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- 7,500
|
8
|
6
|
6
|
|
7,501-11,100
|
8
|
8
|
6
|
|
11,101-15,700
|
10
|
8
|
8
|
|
15,701-19,500
|
10
|
10
|
8
|
|
19,501-24,800
|
12
|
10
|
8
|
|
24,801-31,000
|
12
|
12
|
10
|
|
31,001-44,000
|
14
|
12
|
10
|
|
44,001-60,000
|
14
|
14
|
12
|
In all buildings the whole or part of the house
drainage and plumbing system of which 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.
All sub house 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 either be automatically
discharged or be of sufficient capacity to receive the house sewage
and wastes for not less than 24 hours.
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 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
the sewage is to be raised.
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.
