I am looking for a backwater valve to be used outside, (no vault) but it must have a inlet and outlet that are level so it can be installed without having to lower the sewer side of the line. All the outside ones I have seen have the downstream side lower and you loose grade if you can't chase the pipe out and lower it. If you loose the grade all the solids build up at the flapper and it may or may not work when needed. An extendable installation is what I want.
No announcement yet.
Anybody know of a flat sewer Backwater valve?