washer drain effect on downstream toilets
Posted by doug sanders on January 18, 2004 at 20:18:07:
I have two upstairs toilets which are downstream from the upstair washing machine. When the washing machine drains, the water in the toilets moves up and down (sometimes a bubble comes up) and you cannot flush the toilets when the washing machine drains. I'm guessing it's siphonage from the force of the draining water. Is there anything I can do to prevent or minimize the siphonage? There is a 2 inch vent that terminates in the attic with a Studor AAV minivent - would changing to a bigger AAV help add venting or am I limited by the vent pipe size?


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