First close manual shutoff located before the fill-valve, then draw system pressure down to 12psi (or other preset pressure) and observe system for pressure buildup several hours later.
首先关闭位于进水阀之前的手动关闭阀，然后将系统压力降到12psi(或其他预设压力)，几个小时后，观察系统的压力上升状态。
First close manual shutoff located before the fill-valve, then draw system pressure down to 12psi (or other preset pressure) and observe system for pressure buildup several hours later.
首先关闭位于进水阀之前的手动关闭阀，然后将系统压力降到12psi(或其他预设压力)，几个小时后，观察系统的压力上升状态。
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