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Section P-815 Relief Outlet Connections
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When the relief outlets of relief valves are connected by piping to discharge into the drainage system, such pipe shall be connected as an indirect waste. Piping from the relief outlets shall be equal to or greater than the cross-sectional area of the discharge outlet on the relief valve and shall discharge within six inches of the floor.
Drip pans under hot water heaters located in apartments shall be piped to an indirect waste line. In high-rise apartments, this condensate shall be carried down to the lowest level and discharged to an indirect catch basin or fixture having a minimum size equal to the indirect waste riser accepting one or more drip pans, but in no case less than 1-1/4 inch.
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