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NYC Plumbing Code

§ 1106.2 — § 1106.2

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What is NYC PC § 1106.2?

Quick Answer

This section outlines the requirements for sizing vertical and horizontal storm drain piping based on the flow rate through the roof drain. The flow rate must not exceed the capacities specified in Table 1106.2. Applies to building owners responsible for storm drainage systems.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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1106.2 Size of storm drain piping.

PC § 1106.2

Vertical and horizontal storm drain piping shall be sized based on the flow rate through the roof drain. The flow rate in storm drain piping shall not exceed that specified in Table 1106.2. Table 1106.2Storm Drain Pipe Sizing Pipe Size(inches)Capacity (gpm)Vertical DrainSlope of Horizontal Drain1/16 inchper foot1/8 inchper foot1/4 inchper foot1/2 inchper footPipe Size(inches)Capacity (gpm)Vertical DrainSlope of Horizontal Drain1/16 inchper foot1/8 inchper foot1/4 inchper foot1/2 inchper foot234152231443873955791114180811151632315311117165234331653824334448768981,1175057141,0101,429102,0509271,3111,8552,623123,2721,4802,0932,9604,187144,2041,3121,8562,6213,713155,5432,5083,5465,0167,093165,5432,5083,5465,0167,093188.2183,1004,3866,1928,773

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