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Pennsylvania Statutes Title 53 P.S. Municipal and Quasi-Municipal Corporations § 14816. Traps for fixtures;  size of traps and branches

Current as of January 01, 2026 | Updated by Findlaw Staff

Every sink, bath-tub, basin, water-closet, slop-hopper, or fixtures having a waste-pipe, must be furnished with a trap, which shall be placed as close as practicable to the fixture that it serves, and in no case shall they be more than one foot from said fixture.  The waste-pipe from the bath-tub or other fixtures must not be connected with a water-closet trap.

Size of Horizontal and Vertical Waste-pipe Traps and Branches:

Horizontal and Vertical.

Number of Small Fixtures.

1 1/4 inches

 1

1 1/2 inches

 2

2 inches

 3 to 8

2 1/2 inches

 9 to 20

3 inches

21 to 44

If building is ten (10) or more stories in height, the vertical waste-pipe shall not be less than three (3) inches in diameter.  The use of wrought-iron pipe for waste-pipe two inches or less in diameter is prohibited.

The size of traps and waste branches, for a given fixture, shall be as follows:

Kind of Fixtures.

Size in Inches.

Trap.

Branch.

Water-closet․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

3

4

Slop sink with trap combined․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

3

3

Slop sink ordinary․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

2

2

Pedestal urinal․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

3

3

Floor drain, or wash․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

4

4

Yard drain or catch basin․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

4

4

Urinal trough․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

2

2

Laundry traps (2 or 5)․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

2

2

Combination sink and tray (for each fixture)․․․․․․․․․․․․․․․․․․․․․․․․․․

1 1/2

2

Kitchen sinks (small) for dwellings․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

1 1/2

1 1/2

Kitchen sinks (large), hotels, restaurants, grease trap․․․․․․․․․․․․․․․

--

2

Pantry sinks․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

1 1/2

1 1/2

Wash basin, one only․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

1 1/4

1 1/4

Bath-tubs 4x10 inches, drum trap․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

--

1 1/2

Shower baths․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

1 1/2

1 1/2

Shower baths (floor)․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

2

2

Sitz baths․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

1 1/2

1 1/2

Drinking fountains․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

1 1/4

1 1/4
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Cite this article: FindLaw.com - Pennsylvania Statutes Title 53 P.S. Municipal and Quasi-Municipal Corporations § 14816. Traps for fixtures;  size of traps and branches - last updated January 01, 2026 | https://codes.findlaw.com/pa/title-53-ps-municipal-and-quasimunicipal-corporations/pa-st-sect-53-14816/

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