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Thread: Can AAV be installed upside down?

  1. #1
    DIY Junior Member tuolumne's Avatar
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    Default Can AAV be installed upside down?

    I have a washing machine that will be difficult to vent. Can I bring the vent back into the top knock-out in the washer box with an AAV? I was unable to find a washer box with 4 knock-outs in the bottom.

  2. #2
    Master Plumber Dunbar Plumbing's Avatar
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    Absolutely not
    Read what the end of this sentence means.

  3. #3
    DIY Junior Member tuolumne's Avatar
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    Thanks for the quick response.

  4. #4
    DIY Senior Member construct30's Avatar
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    Quote Originally Posted by RUGGED View Post
    Absolutely not
    Correct, but you also need to get it at least 6" above the top of the pipe, which means you need an access panel above the box. Just putting it into the box would not be high enough. The panel should allow for air to enter.
    Last edited by construct30; 01-06-2008 at 12:52 PM.

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