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  1. G

    4x4x3 wye or 4x4x4 wye with 3" bushing... Which is better?

    Hi, everyone. This one’s for the plumbing nerds (like me)… I'm working on the DWV plans for my total rehab house, and I was wondering if anyone had any opinions about which type of wye they like to use when transitioning from a 3" vertical stack to a 4" horizontal in the basement. In my last...
    • gkull
    • Thread
    • dwv system plumbing science transition vertical stack waste pipe wye
    • Replies: 1
    • Forum: General Plumbing Help
  2. Gabriel Wiley

    Help/Advice needed transitioning ABS to Cast Iron for bathroom sink drain.

    Hi there! First time posting here, Id appreciate any advice you can give me. Im installing a new sink in my bathroom and I can't figure out how to connect the ABS to this 1 1/2" cast iron drain hole. It looks like it's both venting and draining. I'd rather not tear open the drywall and replace...
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