| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a piping washing method for preventing the life of an ozone generator from being affected poorly and at the same time miniaturizing a device. SOLUTION: In the sterilization washing method of water-supply piping for tap water, water supply is stopped, compression air is supplied from the secondary side of a water meter, tap water remaining in the water-supply piping is pushed out of a water faucet, then an ozone gas is supplied from the secondary side of the water meter into the water-supply piping to bring the ozone gas into contact with the cover of water in the water-supply piping, and compression air is intermittently supplied into the water-supply piping while supplying water.</p> |
