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Adequate pumping equipment shall be provided in every nonprivate swimming pool. Pumping equipment shall be provided in accordance with the following:
1. The pump has sufficient capacity to discharge the volume of water required for a six-hour turnover of the pool against the maximum head in the recirculation system.
2. The pump used for backwashing sand filters has sufficient capacity to backwash a filter unit at the rate of at least 15 gallons per minute per square foot (56.8 lpm/0.09 m
2
) of filter area.
3. The pump develops a good suction when the pipes for a suction cleaner are connected to the recirculation system.
4. A compound vacuum-pressure gauge is installed on the recirculation pump suction line; and a pressure gauge on the pump discharge line.