SECTION P-1113  SUMPS AND PUMPING SYSTEMS
P-1113.1 Pumping System.
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P-1113.1.4 Piping. Discharge piping shall meet the requirements of Section 1102.2, 1102.3 or 1102.4 and shall include a gatefull open valve and a full flow check valve. Pipe and fittings shall be the same size as, or larger than, the pump discharge tapping.
Exception: In one- and two-family dwellings, only a check valve shall be required, located on the discharge piping from the pump or ejector.
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