10:03AM | 11/07/13
Hi. . We have a newly replaced stop and waste valve at our main water shutoff in the basement. Is this the same as a Sewage backwater valve?

If you would clarify the difference if there is one.

Thanks. .. Tara and Alan


09:12AM | 11/09/13
Member Since: 07/22/04
530 lifetime posts
The difference is a stop and waste valve shuts off water supply and allows you to drain the line at that point. A sewage backwater valve is basically a flapper in the sewage line that prevents sewage water from backing into the home.


09:49AM | 11/09/13
Is a backwater valve worth installing in the basement or is a stop and waste valce sufficient? What would the approx cost of having a sewage backwater valve installed?


02:19PM | 11/09/13
Member Since: 01/24/06
1566 lifetime posts
One has nothing to do with the other

The cost of installing a back water valve (Check valve) is $23,750 to do it according to code

1- a permit has to be taken out

2- Shoring to prevent a cave in OSHA 1910

3- Back filling with clean fill and tampering to grade

4- Having the work tested as per HJA



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