// CODE SNIPPET
P-904.5 Minimum Size of Soil and Waste Pipe
JUMP TO FULL CODE CHAPTER
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.
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 ...