G Wayne
New Member
My home was built six years ago. We have a kitchen sink that is positioned on a counter top that has an open wall behind it, opening into the dining room. The plumbers decided to use two AAVs under the sink, one for the right drain, and the other for the left drain and dishwasher. I assume this was a cost-cutting move since venting this through the roof would have required running a lot of additional piping.
Within the first year or two of living in the home, we would get sewer gas smell throughout the house overnight occasionally. We traced the cause to the left drain / dishwasher AAV. It happens irregularly, as often as once every month to once every three months. Each time, I replace the AAV and the issue is resolved until the next occurrence. We suspect that the amount of times the dishwasher is run decreases the amount of time before we need to replace it again. When I replace it, I always notice the bottom of the vent, inside underneath the thread, is wet. I don't think water is getting up into the vent because I'm not seeing any evidence of water along the outside pipe or under the sink. Is it possible that the condensation is causing this regular failure? Perhaps the vent pipe needs to be extended?
Within the first year or two of living in the home, we would get sewer gas smell throughout the house overnight occasionally. We traced the cause to the left drain / dishwasher AAV. It happens irregularly, as often as once every month to once every three months. Each time, I replace the AAV and the issue is resolved until the next occurrence. We suspect that the amount of times the dishwasher is run decreases the amount of time before we need to replace it again. When I replace it, I always notice the bottom of the vent, inside underneath the thread, is wet. I don't think water is getting up into the vent because I'm not seeing any evidence of water along the outside pipe or under the sink. Is it possible that the condensation is causing this regular failure? Perhaps the vent pipe needs to be extended?