(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 3 of 3

Thread: 90 degree horizontal wye

  1. #1
    DIY Junior Member AnimalHungry's Avatar
    Join Date
    Sep 2013
    Location
    Colorado
    Posts
    8

    Default 90 degree horizontal wye

    I'm plumbing in a new 3" waste for a new toilet on the second floor. I have my 3" PVC waste pipe dropping down into the crawl space and I'm tying it into one of the existing 3" horizontal waste pipes down there. There are two changes of direction: vertical to horizontal, for which I'm gonna use a long sweep wye with a clean out on its heel, and then there's a 90 degree horizontal right turn it needs to take. For this I'm thinking I need to use a 45 degree street bend into a 45 degree wye to change the horizontal direction by 90 degrees and enable the waste to flow into the existing 3" horizontal waste pipe. Attached is a crappy drawing of what I'm trying to achieve.

    My concern is that I've read that a wye in the horizontal plane needs to be rotated at least 15 degrees (so the input is 15 degrees above the horizontal). Is this correct? Or is that rule only to be applied in specific circumstances?

    Also, there's another waste pipe to the right of the vertical pipe which is preventing me from twisting the long sweep 45 degrees to its right and just using a 45 wye without the 45 degree street bend for the horizontal change in direction.

    Cheers
    Simon

    Name:  Horizontal wye2.jpg
Views: 133
Size:  43.2 KB
    Last edited by AnimalHungry; 10-05-2013 at 03:02 PM.

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,202
    Blog Entries
    1

    Default

    A wye or combo on it's side is fine.
    The other post was with a sewage pump, and none of us plumbers agree with that one inspector.
    Wyes and combos for waste can be used vertical or horizontal the way you have asked.

  3. #3
    DIY Junior Member AnimalHungry's Avatar
    Join Date
    Sep 2013
    Location
    Colorado
    Posts
    8

    Default

    Great, thanks Terry! So I can just use the 45 degree bend into the 45 wye (on its side) to give me the 90 degree change in horizontal direction.
    Cheers
    Simon

Similar Threads

  1. 90 degree adaptor
    By David95966 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 3
    Last Post: 09-26-2013, 06:07 AM
  2. 90 degree sweep vs. two 45s
    By keve1212 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 4
    Last Post: 02-04-2011, 05:33 AM
  3. Relocating Toilet - 45 degree or 90 degree fitting?
    By ED1 in forum Toilet Forum discussions
    Replies: 7
    Last Post: 09-13-2009, 09:35 AM
  4. Valve with degree marks.. What is it?
    By 502_Jimmy in forum Pumps and Tanks Well Forum & Blog
    Replies: 20
    Last Post: 03-28-2008, 10:12 AM
  5. 11 1/4 degree ABS elbow?
    By Blade_Jones in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 9
    Last Post: 12-18-2006, 07:05 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •