expension tank就是为了缓解这样的水压波动。而热水器上的减压阀只是当水压达到设置的压力(一般是90psi)时才打开,它并不能缓解水压波动。
expension tank就是为了缓解这样的水压波动。而热水器上的减压阀只是当水压达到设置的压力(一般是90psi)时才打开,它并不能缓解水压波动。
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