4" Extendable Backwater Valve. This Backwater Valves is designed to be installed on the inside of a home or building in the basement floor. In some applications it is not possible to install a backflow prevention valve on the inside of the building.
4.5 out of 5 rating is our rating for plumbersstock.com, we got that rating because we have lots of experience and great people with expertise in plumbing. BUT WE WANT YOUR HELP. This product doesn't have any reviews yet, and we don't want to write our own reviews. It is more valuable to us that the customers get to share their experience with our products. Please, if you have any experience with this product, take a moment to share and help someone else who is trying to make a decision. Thank you!