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My house is 120 years old and is not properly vented for the kitchen sink drain. When the washing machine drains, it cause the kitchen sink to girgle. I installed one of the interior vents with the rubber bladder and it worked find for about a year. Then it stopped working so I replace it but it still doesn't work. The bladder gets wet and I'm sure that's why it won't work but the vent is about a foot above the drain pipe and I even put an elbow in the pipe so there isn't a direct shot to the vent and I can't understand why it keeps getting wet. It's driving my wife nuts. Any suggestions?
 

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HVAC / Plumbing
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Are you saying you installed an AAV & it doesn't work ?? Short of tearing out the interior wall & adding a vent.. You can go to an outside wall & run above the roof..
 
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