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// CODE SNIPPET

P-904.5 Minimum Size of Soil and Waste Pipe

Philadelphia Plumbing Code > 9 Soil and Waste Piping > P-904 Sizes > P-904.5 Minimum Size of Soil and Waste Pipe
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No soil or waste stack shall be smaller than the largest branch draining into it regardless of the height of the building. Soil stacks receiving the discharge of water closets shall not be less than 3 inches in diameter, as provided in Table P-904.4. Three-inch Soil stacks shall be limited to two water closets. No horizontal soil pipe or waste pipe draining pedestal urinals or water closets shall be less than 3 inches in diameter. When using 3-inch ideal bends (closet bends) to receive the discharge of water closets, this fitting shall be a blind bend containing no drainage connections for other fixtures. No waste pipe shall be less than 1-1/4 inches in diameter except that waste pipe drip lines from soda fountains, coffee urns and refrigerator cases shall be minimum 1-inch nominal diameter and not over 12 feet in length when trapped and discharged into an open fixture. Fixture branch pipes shall conform to Section P-506.

P-904.5.1 Main House Drain

The minimum size of the main house drain receiving the discharge of water closets shall be 4 inches inside nominal diameter.

Related Code Sections


P-904.5 Soil and Waste Piping, Minimum Size of Soil and Waste Pipe
water closets. No horizontal soil pipe or waste pipe draining pedestal urinals or water closets shall be less than 3 inches in diameter. When using 3 ...
Philadelphia Plumbing Code > 9 Soil and Waste Piping > P-904 Sizes > P-904.5 Minimum Size of Soil and Waste Pipe
P-919.2.11 Vents, Minimum Size of Soil and Waste Pipe
be limited to six water closets. No horizontal soil pipe or waste pipe draining water closets shall be less than 3 inches (76 mm) in diameter. When using 3 ...
Plumbing Code 2018 of Philadelphia > 9 Vents > P-919 Philadelphia Single-Stack Waste and Vent System > P-919.2 Drainage System Sizing > P-919.2.11 Minimum Size of Soil and Waste Pipe
P-919.2 Vents, Drainage System Sizing
to the horizontal branch pipe that discharges into a soil or waste stack. The size of the main soil stack shall be sized according to the largest branch ...
Plumbing Code 2018 of Philadelphia > 9 Vents > P-919 Philadelphia Single-Stack Waste and Vent System > P-919.2 Drainage System Sizing
Section P-919 Vents, Philadelphia Single-Stack Waste and Vent System
) HOUSE DRAIN OR HORIZONTAL BRANCH VERTICAL SOIL OR WASTE STACK PIPE SIZE (Inches) 1 / 16 " FALL 1 / 8 ...
Plumbing Code 2018 of Philadelphia > 9 Vents > P-919 Philadelphia Single-Stack Waste and Vent System
Section P-906 Soil and Waste Piping, Condensate and Blowoff Connections
methods shall be provided which automatically cool the exhaust to 140° F or less, if the waste is discharged to the house drainage system. If potable ...
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