如果在排气口处又连续的水泄漏，则表示这个装置有问题。

If there is a continuous leakage of water at the vents, this indicates a faulty device.

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如果水从排气口持续滴漏，则第二止回阀泄漏。

If water drips continuously from vent, second check is leaking.

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阀门的缺点：当阀门排气口处是真空时，阀门在阀杆附近容易泄漏，特别是内部泄漏。

Valve Disadvantages: the valve is prone to leakage around the stem, especially in-board leakage when a vacuum is pulled on the valve outlet.

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