| 摘要 |
PROBLEM TO BE SOLVED: To provide water supply equipment comprising a main reverse flow preventing unit and an auxiliary reverse flow preventing unit installed in parallel, which prevents the water of deteriorated quality stagnating in the auxiliary reverse flow preventing unit from being supplied to a demand place, a method for washing the inside of the auxiliary reverse flow preventing unit, and a reverse flow preventing unit switching method. SOLUTION: The water supply equipment is equipped with the main reverse flow preventing unit 14 and the auxiliary reverse flow preventing unit 15. The water supply equipment guides the water flowing into a suction opening 12 to a pump via the main reverse flow preventing unit 14 or the auxiliary reverse flow preventing unit 15, pressurizes the water by the pump, and supplies the water to a water supply target position from a discharge opening. The water supply equipment is provided with a drain outlet 48 for discharging the water accumulated in the auxiliary reverse flow preventing unit 15, and a drain outlet opening/closing means (cock 49) for opening and closing the drain outlet. COPYRIGHT: (C)2009,JPO&INPIT
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