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#10
10-10-2011, 06:08 AM
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Hey man, I work in the oil and gas industry, and we use flapper (check) valves. Our apporach when when we evalurate a faciity is that check valves will always fail at some point. Its the same case, that valve will fail..
I built a system that is pump fail & power fail safe and doesnt use a check valve. drop me a note if you want details. 
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