plumbing question

[eolthof]

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.