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Question DetailsAsked on 12/13/2011

why does my upstairs toilet gurgle when the downstairs toilet is flushed?

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2 Answers


It's because when the downstairs toilet is flushed suction is created in the line. It sounds like the downstairs toilet was not given it's own vent pipe. A plumber would need to run a camera to verify this. Whenever water is run through a drain it pulls air with it from somewhere to go on through the pipe. Either your vent pipe is clogged going up through the roof or the system was improperly put together. has it always done this? If so it is likely incorrect plumbing. If it is a recent development it is more than likely a clogged pipe and a relatively cheap fix.

Answered 8 years ago by Todd's Home Services


I have the same problem and it began the same day that my plumber replaced our water heater. What could he have done to cause this? If you flush a toilet or use the washer or dishwasher it sucks air through all the other drains in the house. Sounds awful! Please help!

Answered 8 years ago by kycat19

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