The drum of my washing machine fills up with waste water from my kitchen sink and when my washing machine drains the water gurgles up thru the plug hole in my kitchen sink, filling the sink. When this happens water leaks from under the sink to where the U bend pipe is. Can anyone tell me whats going on? I hav a plumber calling next week to install a dishwasher so i'll hav him look at it. But i'd like to know if it is a simple problem or a big one to fix. Thanks
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