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Thread: Vertical Stack off-set 45 or 90.

  1. #1
    DIY Junior Member patma's Avatar
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    Default Vertical Stack off-set 45 or 90.

    Hello.
    I have a master bath drain (shower, lav, WC) turning down into a closet chase. This drain pipe is horizontally off-set from the main sewer stack by about 2.5 feet. (The main stack is positioned tightly in the corner of the closet to maximize usable space.) I was going to 45 it over then 45 it down into the corner (main stack) but that takes up a lot more space in the closet. Can I use two long 90's to connect provided the pitch is there? Thank you in advance. (I live in ICP state)

    Rough drawing

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  2. #2
    Test, Don't Guess! cacher_chick's Avatar
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    Is this a dry vent, or is there a drain connection above the offset?

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    Forum Admin, Expert Plumber Terry's Avatar
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    Code lets you do either in that situation.
    The 45's will be a bit speedier.

  4. #4
    DIY Junior Member patma's Avatar
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    Drains the lav, shower and WC. The vertical drop past this section is 10 feet

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    DIY Junior Member patma's Avatar
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    Quote Originally Posted by Terry View Post
    Code lets you do either in that situation.
    The 45's will be a bit speedier.
    Thanks Terry. This was my concern about a 90. Is the speed a concern if my main line is 50 yrs old but seems to be working fine. We have 25 feet of main line out to the sewer connection at the street.

    Given the short run and limited use of the bath, might have to try the 90. Guess I could always replace in the future given the easy access. ???

  6. #6
    Forum Admin, Expert Plumber Terry's Avatar
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    It's all going downhill. It will get there.
    From a plumbers perspective, I just like fewer changes of direction if I can. But waste dropping downhill? Not a big deal.

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    DIY Junior Member patma's Avatar
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    Thanks for your time.. and great site. Love to learn and do things right... My plumber loves it too b/c he gets paid and I do the work..

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