flushing? I heard it was supposed to be flushed twice a year ..

来源: xiaoyixiao 于 2009-08-20 10:36:32 [] [旧帖] [给我悄悄话] 本文已被阅读： 次 (161 bytes)
回答: 换装节能热水器（上）——房崇修房 15 由 房崇 于 2009-08-18 19:44:03
just for better quality of hot water I guess. How to? Just open up some faucets, let all the hot water run out ... until you only get cold water. that is it.
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