Cellar or basement floor drains shall connect into a deep seal trap so constructed that it can be readily cleaned, and of a size not less than three inches in diameter. When subject to backflow of back pressure, such drains may be equipped with an adequate backwater valve or a standpipe no less than two inches in diameter, and same to be four feet above cellar floor.
A. 
Backwater valves shall have all bearing parts or ball of noncorrodible metal, and so constructed as to insure a positive mechanical seal and remain closed except when discharging wastes. All backwater valves must be approved by the Examining Board of Plumbers.
B. 
If a backwater valve is placed in the main sewer back of the house trap, a fresh-air inlet must be placed back of the backwater valve and extended from there through the wall or roof to outer air.
A. 
All cellar floors shall have three-inch drain tile around the inside of the wall and be pitched 1/16 inch to one foot to the drain, and be connected to a suitable P trap or running trap, with handhole to be provided in the main house drain within two feet from the inside of the front cellar wall by the plumbing contractor. All drain tile shall have the joints wrapped with burlap or some other suitable means to prevent dirt from entering same. The Plumbing Inspector shall be notified by the contractor and all drain tile and grades shall be inspected before concealing same.
B. 
All subsoil tile drains, when subject to backflow or back pressure, are to be protected against same by an automatic back-pressure valve, accessibly located, before entering house drain.
C. 
When subsoil catch basins are installed below sewer level, automatic water ejectors provided with a ball-float attached to the main water supply shall be used, or an electric ejector may be used; such ejector or any device raising subsoil water shall discharge into a proper trap; minimum four by five drum trap.
A. 
The floor drain of a garage must drain into a catch basin of approved design with a deep seal trap and a perforated iron cover.
B. 
If tile is used, a leg of cast iron not less than 12 inches must be used to form a seal and must have a brass cleanout not less than three inches in diameter at the top of the outlet in a catch basin with standard pipe thread. All other traps and traps for pits in garages, public or private, connected with a sewer must be approved by the Examining Board of Plumbers.
A. 
Sand traps or catch basins shall be installed on the waste pipe from any fixture or yard, stable, manure pit, cellar, floor or subsoil drain or roof leader or other waste, the discharges from which may contain sand or other gritty or clogging matter.
B. 
The sand traps or catch basin shall be installed on said waste pipe above its junction with any conduit or receptacle containing sewage. The passing of human excrement through a sand trap or catch basin is prohibited.
C. 
Sand traps and catch basins, when installed, shall be so designed and placed as to be readily accessible for cleaning. They shall be constructed in the same general manner as provided for grease catch basins, except that they shall be at least 20 inches inside diameter and, where possible, the outlet shall be at least four feet below the surface of the ground. The outlet shall be submerged at least eight inches and shall not be less than 15 inches above the bottom of the basin.
D. 
Where the waste passing through a sand trap or catch basin may contain foul-smelling matter and said sand trap or catch basin is located within a courtyard or within 12 feet of the outside walls of a building, or said sand trap or catch basin is connected to a pipe or receptacle containing sewage or is connected to a plumbing system in such a manner that ventilation through the entering soil pipe is not always possible, said sand trap or catch basin shall be vented with a four-inch vent pipe. Said vent pipe shall be connected to the highest practicable point in the sand trap or catch basin.
A. 
In all buildings in which whole or part of the house drainage and plumbing system thereof lies below the crown level of the main sewer, sewage or house waste shall be lifted by approved artificial means and discharged into the house sewer.
B. 
All subhouse 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.
C. 
The soil or vent pipe leading to an ejector or other appliances for raising sewage or other waste matter to the sewer shall, where a water closet or closets are installed, be provided with a vent pipe not less than three inches in diameter, same to be carried separately through the roof; and where fixtures other than water closets are installed, the waste and vent pipe shall be the same diameter as the waste pipe, and a trap with fresh air inlet shall be placed in the sewer before entering the ejector.
A. 
The exhaust blowoff or drip pipe from a steam boiler shall not connect directly with any sewer, drain, soil or waste pipe. Such pipes shall discharge into the top and above the line of discharge of a suitable closed tank or condenser made of wrought- or cast-iron, provided with a relief pipe of at least three inches in diameter, extending to the outer air above the roof.
B. 
The waste from said tank or condenser shall be taken from the bottom and be at least one size larger than the inlet, but not less than three inches in diameter, and provided with a trap that has a seal not less than 24 inches and, where possible, shall connect to the house drain.
C. 
Water heated to over 140° F., shall not be allowed to enter any street sewer, drain or lateral. When blowoff tanks discharge water at a high temperature, they shall be provided with a cooling device.
All direct-connected hydraulic elevators, lifts or pressure machines shall be provided with an intermediate tank of sufficient capacity as to discharge its waste without pressure into any sewer, drain, soil or waste pipe. Such tanks shall be trapped and, where there is danger of back pressure from sewer, there shall be placed on its outlet side a sewer or backwater valve.
Where the minimum size house drain is allowed, the trap for the floor drain must connect into the main drain at least five feet from the soil pipe, or may be connected into a three-inch drain that receives only the waste of tray and sink.
The required sizes of storm-water house drains 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, and in no case shall be less than three inches:
Storm Systems Only
Diameter of Pipe
(inches)
Maximum Drained Roof Area in Square Feet
(slope 1/8 inch fall to 1 foot)
3
865
4
1,860
5
3,325
6
5,315
8
11,115
10
19,530
12
31,200
14
42,600
A. 
No gutter or inside leader shall be less than the following. Outside leaders to the front line shall be one size larger than required in the table below:
Size of
Area of Roof
(square feet)
Gutter
(inches)
Leader
(inches)
Up to 90
3
1 1/2
91 to 270
3
2
271 to 810
4
2 1/2
811 to 1,800
5
3
1,801 to 3,600
6
4
3,601 to 5,500
8
5
5,501 to 9,600
10
6
B. 
Gutters eight inches or over in width on new buildings shall be hung with wrought-iron hangers of approved type.
A. 
All paved areas, yards, courts and courtyards shall be drained into the stormwater sewer system and not into sewers intended for sewage only. Where there is no stormwater sewer accessible, such connections shall be discharged into the public gutter, unless otherwise permitted by the proper authorities, and, when connected to the storm sewer, need not be trapped.
B. 
No downspouts or sump pumps from any buildings shall be discharged in such a manner as to drain to adjoining properties.
[Added 10-20-1981]
C. 
Materials used for stormwater piping and back yard drains shall conform to ASTM 3034 SDR 35 (slip joint) or equal. All work performed on property owned by the City shall be completed under the supervision of a licensed plumber.
[Added 4-18-1989]
D. 
Excess yard water, basement flood water, swimming pool, fountain, pond or any incidental water drained from private property must be drained directly into the public storm water sewer system. Where no storm water sewer is present, the water must be drained directly into the public gutter.
[Added 8-20-2019]
All cast-iron pipe and fittings for underground drainage use shall be coated with asphaltum or coal-tar pitch.