- Reaction score
- northeastern Ohio
when the furnaces running either on heat or AC it's pulling air out of the drain in the washer room, which is bringing in smells from that drainpipe, as far as we could tell there's a trap on that pipe, drain. but this happens on both units/slab construction, when the furnace is not running there's no smell,. The plumbing's approximate 25 years old PVC.. Any thoughts?