Re: Basement flooding even after new check valve installed...

Posted by brewster on 2017/5/11 13:46:10
Just to clarify with a little physics, water seeks its own level. When your upstairs neighbor flushes, the level in the drainpipe will not rise above the level of the street sewer, it WILL drain, even if you have a check valve. If that sewer level is above your basement toilet or sink, then you have problems already, but they can become shittier.

As for BK, the trendy areas around Park Slope are on relatively high ground.

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