We use these check valves to keep water from siphoning out of the tank when the power is out.  They are made with a rubber flapper instead of a spring like some of the cheaper ones. 

Check Valve

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We use these check valves to keep water from siphoning out of the tank when the power is out.  They are made with a rubber flapper instead of a spring like some of the cheaper ones. 

Customer Reviews

Based on 63 reviews
83%
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8%
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5%
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2%
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3%
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R
R.B.
Good
C
C.S.
Safety first
S
S.S.
The valve that could.