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So i need to move the vent line under the p-trap and above the sink p-trap

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Can I run 2 traps off of one vent like this?

  • Robert, welcome. Please take the tour so you know what's expected of you. "Thank you" comments are discouraged. – isherwood Feb 20 at 18:29
  • Double check with your inspector on sizing. Mine required an up size on the washing machine's drain and vent. – UnhandledExcepSean Feb 20 at 18:44
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No you need to run it like this. enter image description here The vent is supposed to balance the pressure on the sewer side of the trap. Don't connect upstream of the trap as in your illustration, you will get sewer gas inside the house.

  • Also I don't think you need to use 2" for the vent. I think 1-1/2" is sufficient. (check your local code) – Joe Fala Feb 21 at 3:02

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