Pan
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Is this a good substitute for a regular check valve ?
http://www.petersonvalve.com/backflow/photos.htm
http://www.petersonvalve.com/backflow/photos.htm
From the picture it appears that the "valve" squeezes shut to seal. If so, it would only seal to uniformly shaped solids, not irregular stuff.
Does your main building sewer back up into your basement during heavy
rains? No - but we dont have a basement drain. Just a sink in the basement.
If so how often? NA
Have you had your main augered recently? Yes - twice. Root intrusion - the first time did not get it all
Thought about having your main cameraed?
Yes- showed some roots. But the backup was not gradual- it was like it was a spurt. The city was doing some work around the manholes both the times the backup occured. The inspector spoke of thr city flushing of the mains...
This is awkward, but...
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