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Basement Bath Sink / Laundry Vent Smell

2K views 1 reply 2 participants last post by  Alan 
#1 ·
I recently installed a bathroom in my basement and used a pump to drain the vanity and washer. Everything works well except after sitting for two days I get a nasty smell when the pump kicks on for the 1st time. I have vented to the outside off of the pump vent fitting with 1.5 inch pvc. The Pump has a 7 foot lift and i have a one way valve on the pump outlet. The vanities both have ptraps on them and the washer dumps into a slop sink and is also traped to the pump. I tried double trapping the sinks and still no luck. Any Suggestions. Thanks
 
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