Carry out regular leakage tests on concealed piping and check for overflowing tanks, waste, worn tap washers and other defects in the water supply system.
定期检查隐蔽水管，以防漏损，检查内部供水系统，修理有毛病的水箱、水头及其他的供水设施。
Carry out regular leakage tests on concealed piping and check for overflowing tanks, waste, worn tap washers and other defects in the water supply system.
定期检查隐蔽水管，以防漏损，检查内部供水系统，修理有毛病的水箱、水头及其他的供水设施。
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