home depot valve VS. external scupper

demolition_x

Not After Fame & Fortune
i had mine attached to the pipe and filled it with water. let it sit over night right side up and there wasn't a drop of water missing. i tried the same with the 2 piece valve from lowes and all the water was gone before i walked away.
 

demolition_x

Not After Fame & Fortune
what do you ask them for exactly. I said one way valve at home depot and they looked at me like I was crazy. The only valve I found that looked close had a loose flap that did not look like it would close completly.

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They are in the plumbing aisle next to the sump pumps. They are really a sump pump check valve, they are in a white box and are made by flotec.
 
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