After the test has been applied and approved by the Inspector,
cast-iron drain, soil, waste and vent pipes may be coated, but in
no case shall any coating be applied to cast-iron pipe for drainage
until the test has been applied and approved.
The smallest inside diameter of trap and waste branch for a
given fixture shall not be less than that shown in the following table:
|
Kind of Fixture
|
Size of Trap and Branch
(inches)
|
|---|---|
|
Bathtub with shower
|
1 1/2
|
|
Washbasin
|
1 1/4
|
|
Shower stalls
|
1 1/2
|
|
Drinking fountain
|
1 1/4
|
|
Floor drains
|
2
|
|
Laundry trays
|
1 1/2
|
|
Water closets
|
4
|
|
Sinks, kitchen
|
1 1/2
|
|
Sinks, large hotel or public
|
2
|
|
Sinks with dishwasher
|
1 1/2
|
|
Washing machines
|
1 1/2
|
|
Urinals, trough
|
2
|
|
Urinals, pedestal
|
3
|
|
Urinals, lip
|
1 1/2
|
A.
The maximum fixture units on horizontal soil and waste lines shall
be as follows:
|
Diameter of Drain
(inches)
|
Fixture Units
|
Number of Water Closets
| |
|---|---|---|---|
|
1 1/4
|
1
| ||
|
1 1/2
|
2
| ||
|
2
|
6
| ||
|
3
|
20
| ||
|
4
|
72
|
12
| |
|
5
|
150
|
25
| |
|
6
|
300
|
50
| |
|
8
|
900
|
150
|
B.
The main vertical soil, waste or ventilating pipe shall be not less
than four inches in diameter.
In determining the number of fixture equivalents, the following
table shall be used:
|
Traps
(inches)
|
Fixture Units
|
|---|---|
|
1 1/4
|
1
|
|
1 1/2
|
1 1/2
|
|
2
|
2
|
|
2 1/2
|
3
|
|
3
|
4
|
|
4
|
6
|
A.
Every branch or horizontal soil or waste pipe to which a group of two or more fixtures are to be connected, and every branch line or horizontal soil pipe eight feet or more in length to which a water closet is to be connected, and every waste pipe 12 feet or more in length to which a fixture is to be connected shall be ventilated either by extending said soil or waste pipe to at least one foot above the roof or by extending said soil or waste pipe and connecting it with the main soil pipe three feet above the highest fixture, or by ventilating or anti-siphon pipe, as provided in Subsection B hereof.
B.
Anti-siphon pipes. All anti-siphon vent pipes, lines and branches
shall be cast iron, copper or galvanized steel.
C.
No brick, metal or earthenware flue or chimney flue shall be used
as a sewer ventilator or to ventilate any trap, drain, soil or waste
pipe.
A.
Small-fixture wastes, not to exceed two, may be connected to the
lead or iron bend.
B.
All waste pipes shall be connected directly with the drainage systems,
except refrigerator waste pipes, discharge of waste pipes from water
filters, gas engines, soda-water fountains, air compressors and/or
vacuum cleaners and taprooms. They shall be discharged into a water-supplied
open fixture properly trapped.
All offsets must be made at an angle of not less than 45°
to the horizontal, and all lines must be connected at the bottom with
a soil or waste pipe or the drain in such manner as to prevent the
accumulation of rust scale. Branch vents must be kept above the top
of all connecting fixtures to prevent the use of vent pipes as soil
pipes.
All materials shall be of good quality, free of defects, and
all work must be executed in a thorough, workmanlike manner.
A.
Except as provided in § 260-33 hereof, all cast-iron pipes and fittings must be uncoated, sound, cylindrical and smooth, free of cracks, sand holes and other defects, of a uniform thickness and of full interior diameter as specified, and shall conform to the following relative weights:
|
Pipe Size
(inches)
|
Medium Weight
(pounds per foot)
|
Extra-Heavy Weight
(pounds per foot)
| |
|---|---|---|---|
|
2
|
4
|
5 1/2
| |
|
3
|
6
|
9 1/2
| |
|
4
|
9
|
13
| |
|
5
|
12
|
17
| |
|
6
|
15
|
20
| |
|
8
|
25
|
37
|
B.
All cast-iron pipe and fittings shall have the name of the manufacturer,
size and weight per foot cast on the exterior surface directly back
of the hub of each length or section of pipe in characters not less
than 1/2 inch in length.
All joints on cast-iron pipe shall be made with picked oakum
and molten lead, thoroughly caulked and made gastight. Twelve ounces
of soft pig lead shall be used for each joint for each inch in the
diameter of the pipe.
A.
Water closet connections to lead bends shall be by a heavy brass
closet flange 1/4 inch in thickness, fastened to the floor with screws
or bolts and soldered to the lead bend, the floor plate bolted to
the flange of the water closet, and the joint made tight with rubber
gasket, wax gasket or putty.
B.
Water closet connections to iron bends shall be made with a cast-iron
collar properly yarned and caulked to the bend. When small-fixture
lead waste lines are to be connected to an iron bend, the connection
shall be made with a brass solder nipple with a round wiped joint.
Bit or cup joints will not be permitted. Solder bushings are not permitted.
Lead bends and traps for water closets and slop hoppers shall
be not less than 1/8 inch in thickness. All other lead traps shall
conform in thickness to the lead waste pipe to which they are to be
attached. Lead bends and cast floor flanges for toilets may be used
subject to approval. The name of the manufacturer and the weight per
foot shall be stamped on each lead bend and trap.
Cast-brass ferrules and solder nipples shall be 1/8 inch in
thickness and of full diameter as specified. Brass pipes used for
solder nipples shall be iron-pipe gauge.
A.
No form of trap shall be used unless it has been approved by the
Plumbing Inspector or other designated officer.
B.
Every fixture shall be separately and effectually trapped by a water-sealing
trap placed as near the fixture outlet as possible. One set of washtubs
or trays, only, may be connected with one trap. The discharge from
a fixture shall not pass through more than one trap before reaching
the house drain.
C.
Traps shall not be more than one size larger than the waste pipe
to which they are to be attached. All traps shall be well supported
and set true with respect to their water levels. Vent horns on earthenware
traps are prohibited. Traps that depend on interior partitions for
a seal, except earthenware ones, are prohibited.
D.
All exposed or accessible traps, except water closet traps, must
have brass trap screws for cleaning.
E.
Traps for bathtubs must have a cleanout exposed on the floor of the
bathroom or accessible for cleaning through a utility door at all
times. The body of such traps shall be not less than 2 1/2 inches
in diameter, and the cleanout shall be protected by a water seal of
not less than 1 1/2 inches in depth.
F.
No sink, dishwasher or other receptacle for greasy water in a kitchen
or other room for general cooking shall be connected with the drainage
system unless it shall be trapped with an approved grease trap. This
rule shall not be construed to apply to private dwellings.
A.
Water closets may be only flushed or supplied with water directly
off the water supply pipe when an anti-siphon flushing valve is used
and such valve has been approved by the Plumbing Inspector or other
designated officer.
B.
Special tanks used to supply water for flushing closets must hold
at least six gallons of water when up to the level of the overflow
pipe for each closet supplied, except automatic or siphon tanks, which
shall hold not less than five gallons of water for each closet supplied.
The water in said tanks shall not be used for any other purpose.
A.
Lead waste pipes. Lead waste pipes may be used for short branches
or horizontal lines and for vent connections that are two inches or
less in diameter and shall have not less than the following weights:
|
Diameter
(inches)
|
Weight per Foot
| |
|---|---|---|
|
1 1/4
|
2 pounds 8 ounces
| |
|
1 1/2
|
3 pounds 3 ounces
| |
|
2
|
4 pounds 4 ounces
|
B.
Copper and galvanized tubing. Type K or L or galvanized steel seamless
pipes may be used for drainage, provided same are used with special
drainage fittings. However, copper or galvanized pipes may not be
used where they will be covered or embedded in concrete, earth or
below cellar floors or underground.
Steam or vapor condensation must pass through a condenser or
cooling tank of proper dimensions and then empty into an open water-supplied
fixture properly trapped, or may be connected directly.
All fixtures below the level of the sewer shall discharge into
a sump or receiving tank, made airtight and ventilated by extending
a vent pipe not less than four inches in diameter to a point at least
one foot above the roof of the building. All the contents of the said
sump or tank shall be lifted and discharged into the drainage system
by some approved method, or an improved ejector may be used to lift
the sewage to the drainage system.
Short quarter bends, double hubs and offsets less than an angle
of 45° to the horizontal are prohibited. No saddle hubs or fittings
shall be used inside buildings. Drillings and tappings are prohibited.
Drain connections to sewers shall be made with an approved saddle
Y or combination having bands, each of which is not less than one
inch in width. Saddle must be securely fastened with two bands and
cemented all around the sewer pipe. Care must be exercised in cutting
the hole in the main sewer pipe when such is necessary and the saddle
Y carefully fitted so that no rough edges shall protrude into the
inside of the opening.
