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Off topic: sewer backwater valves
One off the areas that I service has significant sewer backups into the homes every time there is a major rainfall. Most of the homes have a flap type of check valve on the main sewer/drain line. I have found that even with regular cleaning they still tend to get stuck in the open position. I did some searching around online and I found that there are different types of full flow backwater valves. If any one has any experience with these or any advice in general I would greatly appreciate it. Thank you.
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