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Author:
frmflm (IN)
getting smell at kitchen drain when I use laundry washer. The drain for run together at 't' then run to main line on out the house. will a backflow valve help stop this if intalled on kitchen side of the 't'?
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Author:
packy (MA)
there is a trap under the kitchen sink that has a water seal in it. its purpose is to stop smells from coming up thru the piping below.
is it possible that the trap seal is being sucked down the drain when the washer discharges?
forget about a check valve in a kitchen drain. it will just clog up with food particles.
find out why the trap is not doing its job..
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Author:
frmflm (IN)
Thanks for input. Most thing it is a venting problem. I have manufactured home. The bathrooms are on one half of house they both have a roof vent. The washer kitchen sink is on the other side of house. there is no roof vent. But there is this vent thing under the sink, I don't know for sure if there is one in the wall for the washer. All the bath sinks have this same vent under the sink just like in the kitchen. This problem has just started this summer. The house is 20 years old.
Edited 1 times.
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Author:
Pipe runner (AZ)
more proof that mechanical vents should never be installed unless structure prevents.
your AAV (air admittance valve) has failed allowing the trap to be siphoned dry by the action of the wash machine drain. Replacement is usually pretty strait forward operation. You can grab the unit with large channel lock pliers and turn counter clockwise to remove and take to your hardware store to find a replacement. Put a little pipe dope on the threads of the new unit before you install the new one. Might be a good idea to replace any other AAV's in your home before they fail too.
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