Backing Up Washer Drain

Discussion in 'General Plumbing Help' started by ksteen148, Nov 10, 2019.

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  1. Nov 10, 2019 #1

    ksteen148

    ksteen148

    ksteen148

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    Hello everyone,

    I recently put together a drain system for my washer (see attached picture). However, it keeps backing up... did I do something wrong?

    E6E735C1-80C9-475D-B5C2-3AB6CA4860F9.jpeg
    Please help!

    Thanks for your ideas and comments.
     
  2. Nov 10, 2019 #2

    voletl

    voletl

    voletl

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    First things first and that stutter vent needs to be moved much higher it needs to be at least 6 in above the standpipe height also you cannot connect the P-trap to the drain with a Wye it must be done with a tee

    If the drain continues to backup you might have a partial blockage down in the Line open up that clean out and start snaking
     
  3. Nov 10, 2019 #3

    CT18

    CT18

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    What is that 2" connected to. In many areas the 2" from the washer needs to tie into a 3" line. These new machines move a lot of water quickly
     
    Diehard likes this.
  4. Nov 10, 2019 #4

    Diehard

    Diehard

    Diehard

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    While you're at it, raising the top of your standpipe to it's maximum height(probably 48" above the floor for you), would reduce the flow rate discharging from your washing machine. If you think that a high flow rate may be contributing to the back-up.

    Here's an interesting article...
    https://www.pmmag.com/articles/85477-it-s-not-the-plumbing

    Also, the reason for a tee connection...
    fixture_arm-trap-weir-not-higher-than-vent.jpg

    EDIT: Although a good idea, an AAV for a washing machine does not have to be 6" above the flood rim level.
    AAV.jpg
     
    Last edited: Nov 10, 2019

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