进水口的安装需要使用一个品质优良的底阀，以避免进水口压力损失- 拆除内置式止回阀。

Installations with suction lift require a good quality foot valve to avoid loss of prime - remove in-built check valve.

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能够轻易地将球体止回阀转换成底阀。

Easily converts Ball Check Valve to a Foot Valve.

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水泵吸水关的底阀也属于止回阀类。

Water pumps at the end of the relevant type of valve is also a non-return valve.

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