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

Thread: tapping into buried 2" drain line

Hybrid View

  1. #1
    DIY Junior Member pacific480's Avatar
    Join Date
    Jan 2013
    Location
    Iowa
    Posts
    1

    Default tapping into buried 2" drain line

    As part of a basement remodel I'm planning out the rough-in for adding a bath on slab, residential dwelling. I'm going to connect a lav drain line line to an existing below slab 2" PVC buried line. I'll be adding a 2" horizontal 'Y' to the existing line and I've heard PVC repair couplings are notorious for not getting a water tight weld. I'm checking with the city if I can use shielded couplings.

    Alternatively, although I hate adding four 90 degree sweeps to a horizontal line, I could reroute the line to accomodate the new fitting as in the attached drawing? The existing 2" line services only a single bar sink.

    thanks for any advice

    Name:  TapIn.jpg
Views: 86
Size:  30.5 KB

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,401

    Default

    There's a limit on the total number of degrees you can turn a drain before a cleanout is required, and I think that would exceed it. WHy not just put a wye in the straight existing pipe? You do need to maintain the 1/4" per foot drop, and offsetting things might let you achieve that, but it shouldn't be a major deal most of the time.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,201
    Blog Entries
    1

    Default

    I would install a wye off the line, using mission couplings that are schedule 40 size. And no, they don't leak.
    We use them all the time. Adding that many 90 bends is asking for trouble.


Similar Threads

  1. Buried Propane Line
    By Matt Helm in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 5
    Last Post: 03-27-2012, 09:23 PM
  2. Tapping into 4" drain
    By locus123 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 8
    Last Post: 03-14-2012, 02:01 PM
  3. What's the requirement when a buried PEX supply crosses over a buried drain line?
    By Seattle in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 06-29-2011, 06:05 AM
  4. Tapping new PVC sewer line into old existing clay line
    By Don Richmond in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 15
    Last Post: 10-20-2008, 08:11 PM
  5. insulating buried supply line
    By jnrwood in forum Pumps and Tanks Well Forum & Blog
    Replies: 10
    Last Post: 03-19-2008, 09:30 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
  •