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vent pipe

Posted by denny_leroy (My Page) on
Thu, Jul 8, 10 at 11:57

My sister has an older house and every time the city cleans out the sewer line in front of her house, water blows back out of the toilet. I don't see a vent pipe anywhere around the house unless it is vented to the attic. If there is no vent pipe would this cause the problem?

Follow-Up Postings:

RE: vent pipe

Problem isn't a lack of a vent.

She needs to install a 'backwater valve' on the building drain for her house.

A backwater valve is a large 'check valve' that allows waste to flow out from the house, but closes to keep waste from flowing back in.

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