there has been a slight odor that has come and gone over the last few weeks that has returned. it is localized in the kitchen and basement. after locating it, it is coming from the kitchen sink drain. the drain is clean and clear. the drain runs down into the basement and direct into the floor. the laundry tub is directly below. this drain has a seperate vent that runs into the floor. the laundry tub drain runs into a wye into the vent pipe. my dishwasher also runs temporarily into the laundry tub. the smell does in fact seem worse in the kitchen after a few loads of laundry. is it possible this wye is clogged up a bit? my thought was to repipe the drains with pvc and isolate the vent. run the laundrty tub into the drain side? my plan at that time was also to run the washer and dishwasher direct into the drain pipe too. i was going to wait to do this until i put a garbage disposal in when we remodel the kitchen, because the drain is only 1.5". do i need to do it now or is there an easier way to stop this odor?
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