(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 10 of 10

Thread: DWV Toilet to Sanitary t

  1. #1
    DIY Junior Member moshetojinx's Avatar
    Join Date
    Mar 2011
    Location
    MD
    Posts
    5

    Default DWV Toilet to Sanitary t

    Hello All,

    I am about to piece together my first DWV waste and vent lines. The bathroom was remodeled and enlarged to accommodate a 6' tub in a new location. Since I want to keep all in check with codes for MD, I have a few questions please.
    First off does any one see something terribly wrong with my current set up?
    The problem I think I may encounter is the double 3" sanitary t. the water closet drains into a vent elbow which in turn is connected to the double t, from there it all goes 3 south out to the sewer. I plan on using a 1.3 - 1.6 flow toilet. I could use a 3" single t and reroute the kitchen sink to go from a 1.5 and dump into a vertical 3" which will go into a 3" wye if needed.
    The picture is for demonstration. This is close to the actual waste configuration, but the pipe lengths have been shortened on the water closet.
    [IMG][/IMG]

  2. #2
    DIY Senior Member dlarrivee's Avatar
    Join Date
    Jun 2009
    Location
    Canada
    Posts
    1,172

    Default

    Yikes... You certainly don't want to use a santee on it's back like the note says...

    The rest of it needs improving too, I'll let a real plumber chime in.

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,687

    Default

    The sanitary cross, can be a double combination Y-1/8 bend in your situation, but not necessarily in others. You CANNOT change the combination fitting to a sanitary tee, unless you revise the piping. If you are going to reduce the sink drain, do it AT the "tee", not the elbow. What is the "main stack"?

  4. #4
    DIY Junior Member moshetojinx's Avatar
    Join Date
    Mar 2011
    Location
    MD
    Posts
    5

    Default

    Hello hj,

    I will most likely revise the sink to eventually go into a wye just south of the waste (below where double t is).
    I am not sure what you mean by "You CANNOT change the combination fitting to a sanitary tee". Please elaborate by using the colors in the photo.

    Thanks,
    Rob

  5. #5
    DIY Junior Member moshetojinx's Avatar
    Join Date
    Mar 2011
    Location
    MD
    Posts
    5

    Default

    By main stack I mean this what the sink is tied into and above that all of the vent pipes (toilet and shower). My bathroom sink does not have a vent since it is 24" from the 3" vertical vent.

    Thanks,
    Rob

  6. #6
    DIY Junior Member moshetojinx's Avatar
    Join Date
    Mar 2011
    Location
    MD
    Posts
    5

    Default Wye or why not?

    I am trying very hard to do this correctly.
    So from my understanding, I can not use sanitary t's on their backs (horizontal position). Would it be OK to replace it with a wye in a horizontal position with a 45 degree fitting or is this essentially the same thing?

    Thanks,
    Rob

  7. #7
    DIY Member Designie's Avatar
    Join Date
    Jan 2010
    Location
    Detroit, MI
    Posts
    39

    Default

    Quote Originally Posted by moshetojinx View Post
    I am trying very hard to do this correctly.
    So from my understanding, I can not use sanitary t's on their backs (horizontal position). Would it be OK to replace it with a wye in a horizontal position with a 45 degree fitting or is this essentially the same thing?

    Thanks,
    Rob
    A wye fitting with a 45 elbow is the optimum way to do that fitting. It is NOT the same as the sanitary tee.

  8. #8
    DIY Junior Member moshetojinx's Avatar
    Join Date
    Mar 2011
    Location
    MD
    Posts
    5

    Default

    Thanks for your reply.
    I will switch over to wye fittings on the horizontal.

    Rob

  9. #9
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,687

    Default

    Why would you do that. The combo fittings you show are usually easier to work with than "Y"s at those locations. IF the sink is going into the vertical "main vent", and doing so properly, then the sink DOES have a vent. YOU are the one who made the notation, "Note on shower. I will replace the long sweep with a sanitary tee". You CANNOT do that. You have also made the same mistake many people do when they decide that anyone can be a plumber. They think that "bigger is better" when it comes to drain line pipe sizes. You also do not show how you are going to vent the shower using your drain line configuration.

  10. #10
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    The combos you have in the picture, are a one-piece version of a wye + 45. Cannot replace either of those with a san tee. And where are any vents? I see a toilet vented, that's it?

Similar Threads

  1. Making an old well sanitary
    By riverside67 in forum Pumps and Tanks Well Forum & Blog
    Replies: 62
    Last Post: 04-16-2009, 08:58 AM
  2. Sanitary Tee on its back...
    By zxed in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 33
    Last Post: 02-01-2009, 02:26 PM
  3. wye vs. sanitary-tee
    By SuperDaddy in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 8
    Last Post: 04-02-2008, 11:20 AM
  4. Toilet and Vertical Sanitary Tee
    By seaneys in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 10-22-2007, 07:18 PM
  5. adding a toilet with a sanitary tee
    By flushedup in forum Toilet Forum discussions
    Replies: 9
    Last Post: 02-02-2007, 02:10 PM

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
  •