§ 710 — DRAINAGE SYSTEM SIZING
The Philadelphia Code (2026 Code: The Philadelphia Code and Home Rule Charter current through October 8, 2026) · Philadelphia Code Subcode P, § 710
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SECTION 710 DRAINAGE SYSTEM SIZING
P-710.1 Maximum fixture unit load. The maximum number of drainage fixture units connected to a given size of building sewer, building drain or horizontal branch of the building drain shall be determined using Table P-710.1(1). The maximum number of drainage fixture units connected to a given size of horizontal branch or vertical soil or waste stack shall be determined using Table 710.1(2). TABLE P-710.1(1) BUILDING DRAINS AND SEWERS Diameter of Pipe (inches) | Maximum Number of Drainage Fixture Units Connected to Any Portion of the Building Drain or the Building Sewer, Including Branches of the Building Drain Slope per Foot 1/16-inch | 1/8-inch | 1/4-inch | 1/2-inch * * * 3 | - | 36 - | 42 | 50 * * * * * *