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Posted by Edwin Pawlowski on August 30, 2006, 8:13 pm
> We have a downstairs toilet that gurgles whenever someone takes a bubble
> bath in the upstairs bath tub, and drains the water. Once it started
> filling up with soapy water.
>
> I wonder what's causing this. Is there so much air in the bubbles that it
> gets past whatever prevents backflow?
>
> It's a Toto Drake toilet.
Probably the bubble stuff making big bubbles in the drain pipe and perhaps
blocking the vent pipe.
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