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wopachop's avatar
wopachop
Explorer
Jun 30, 2019

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 kitchen sink vent inside the cabinet that causes this?

I open that cabinet and hope it smells worse so i can blame the vent. But it doesnt really smell worse.

Also seems to happen after driving the trailer.

Im the 2nd owner. Ive never put any food down the drain. Dont clean dishes either the trailer is parked on a property and i take the dishes into the house to clean.

Is it just soap scum? Owned the trailer 2 years so the gray tank has been filled with shower water and drained a bunch of times. Ive never tried to sanitize it....if thats even a thing.
  • Yes i do have that back flow dealio!! Saw a guy on this forum talk about how they can leak if water flow gets low. So i shine a flashlight every time a dump and rinse.

    I feel like the smell is more gray tank than black tank. But please point me in any direction to fix the issue. Only seems to happen come summer heat.
  • If you have a black tank flush you could have a bad back flow preventer, my last 5th Wheel had this device mount under the bathroom sink.

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