Vent under sink cause of smelly trailer?
My trailer smells gross come summer time. Was gone 3 weeks and come home to that sewer smell. To me it smells like gray tank. Pretty sure my P traps are still filled with water. It must be the kit...
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The air admittance valve is a simple check valve usually with a thin rubber disc shaped flap. It is sucked open by the rush of water passing by to allow air into the drain pipe to keep the p-trap from getting sucked dry when the sink drains.
Eventually they can get hard and mis-shapened keeping them from making a proper seal allowing odor from the grey tank to get into the trailer. If the bathroom sink goes to the black tank it will have one that can let black tank odor into the trailer.
Eventually they can get hard and mis-shapened keeping them from making a proper seal allowing odor from the grey tank to get into the trailer. If the bathroom sink goes to the black tank it will have one that can let black tank odor into the trailer.
