vent pipe

denny_leroyJuly 8, 2010

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?

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manhattan42

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.

    Bookmark   July 9, 2010 at 6:31AM
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