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Thread: P-Trap/Vent question for new washing machine

  1. #16
    Moderator & Master Plumber hj's Avatar
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    Default trap

    It would create a deep seal trap and induce resistance. If anything you want to reduce resistance so you try to use the least pipe and fittings possible, not more.

  2. #17
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    Hi Terry,

    I'm going to relocate my laundry plumbing, take a look at these diagrams




    Can I use the method on the second diagram (since the distance between pipe and vent is less than 5')?

    Thanks!

  3. #18

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    You can't dump the washer over the laundry tray.

    The laundry tray will need it's own vent.

  4. #19
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    So, I have to go with diagram 1?

  5. #20
    Forum Admin, Expert Plumber Terry's Avatar
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    No, diagram one show the washer being dumped down the laundry tray vent.

    You need to move the tee for the washer "below" the tee for the laundry tray.


    The washer comes in "below" the laundry tray.

  6. #21
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    Quote Originally Posted by Terry View Post
    No, diagram one show the washer being dumped down the laundry tray vent.

    You need to move the tee for the washer "below" the tee for the laundry tray.


    The washer comes in "below" the laundry tray.
    why does the washer drain require a lower connection, it it because the laundry is a 2" drain and the sink is a 1.5", largest drain goes lowest?

  7. #22
    DIY Member JoshRountree's Avatar
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    Quote Originally Posted by jwbrenna View Post
    why does the washer drain require a lower connection, it it because the laundry is a 2" drain and the sink is a 1.5", largest drain goes lowest?
    If the washer drained above the sink connection it would wash the vent for the sink, since the laundry vents before that it can go below the sink. Both vents are tied together above into 1 vent.

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