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 85 reviews
87%
(74)
6%
(5)
4%
(3)
1%
(1)
2%
(2)
T
T.
Would buy again.
T
T.B.
Perfect! No worries when the power goes out!
J
J.B.
R
R.V.
Works great!
M
M.
Awesome
k
k.p.
check vavle
K
K.X.
Super fast shipping! Everything works!
D
D.O.
Wouldn't be without them
S
S.M.
excellent service
K
K.H.