Installed on basement washing machine standpipe before entering main waste line. Will avert disaster should main line back up.
Roy
Brewster, NY
2 years ago
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Worked perfectly for my purpose
My sump line empties directly into the lake where I live. When the lake level rises, it can flow into my sump line. I installed the device at the end of the pipe. This completely stopped the reverse flow into the pipe. Sump is much more efficient now.
Muzzy
Ohio
2 years ago
Verified Buyer
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Product was exactly as specified online.
I would purchase again.
Bob
Huntington, NY
5 years ago
Verified Buyer
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