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Thread: 90 degree drain turn?

  1. #1

    Default 90 degree drain turn?

    Please forgive what is probably a very simplistic newbie question.
    Current tub drain (1.5" id pvc) has two 45 degree elbows - causing it to require an angled hole through the floor joist.
    Am looking at moving the tub - which will mean rerouting the drain and replacing or sistering the joists.
    QUESTION -
    Is it legal/accetable/wise to turn this drain horizontally at 90 degrees rather than 45?
    My purpose would be to allow me to bore a straight hole through the joist rather than an angled one - and to make that hole closer to the end of the joist (I'm already within the end third - but this would take it further in)
    This would definitely be easier to cut - and (I'm assuming) be less weakening
    to the joist.

    If there is a problem with my plan or the logic behind it - please let me know.
    Thanks

  2. #2

    Default

    (not a pro)
    I totally agree with your logic on the structural integrity of the joist. It's probably an issue of how drastic a 90deg turn would be. Can you make a long sweep instead of using an el?

  3. #3

    Default

    yes - there should be plenty of room for a long sweep.

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