(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 9 of 9

Thread: Washing machine and utility sink tie in question

  1. #1
    DIY Junior Member dannyd38's Avatar
    Join Date
    Feb 2010
    Location
    Maryland
    Posts
    5

    Default Washing machine and utility sink tie in question

    I am going to frame a wall in the laundry room so all the plumbing is out of sight. I want to tie in a washing machine drain and a utility sink drain into the main stack. The stack is currently a 3" copper line that I will be changing over to PVC. Should I use a sanitary t or a wye when connecting to the vertical main stack? Can I use the main as a vent or should I use an air admittance valve? The washing machine will be to the left of the stack and the utility sink to the right. Thanks in advance for any help I receive.
    Attached Images Attached Images  
    Last edited by dannyd38; 02-11-2010 at 06:56 PM.

  2. #2
    DIY Member export!'s Avatar
    Join Date
    Oct 2009
    Location
    Ontario, Canada
    Posts
    90

    Default

    Wow #1 you need a P-Trap. I can't imagine it smells to great where that washer discharge enters. Then you can tackle venting for the two fixtures there.
    IANALP
    (I Am Not A Licensed Plumber)

  3. #3
    DIY Junior Member dannyd38's Avatar
    Join Date
    Feb 2010
    Location
    Maryland
    Posts
    5

    Default

    I understand everything concerning installing traps; I want to be sure to use the right fittings for the tie in. It smells fine, there is a rubber seal on top of the iron pipe preventing the sewer gas’s from escaping.
    Last edited by dannyd38; 02-11-2010 at 10:09 PM.

  4. #4
    Plumber Cass's Avatar
    Join Date
    Nov 2005
    Location
    Ohio
    Posts
    5,984

    Default

    The washer requires a trap and vent as does the sink...the 3" copper line is not a vent it is a waste line....

  5. #5
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    Quote Originally Posted by dannyd38 View Post
    I understand everything concerning installing traps; I want to be sure to use the right fittings for the tie in. It smells fine, there is a rubber seal on top of the iron pipe preventing the sewer gas’s from escaping.

    That gray rubber piece is probably a splash guard, and is far from a seal. Regardless of whether you have odor or not, a trap is absoultely required by ALL codes. The washing machine standpipe is higher thatn allowed by code. An air admittance valve is not proper for a pumped waste source like a washer.

  6. #6
    DIY Junior Member dannyd38's Avatar
    Join Date
    Feb 2010
    Location
    Maryland
    Posts
    5

    Default

    I call it a waste stack/vent line because it was used to vent the sink that was there since 1968 without any issues. I know every fixture needs a trap and needs to be vented. In the original post I asked what fitting is recommend tying into the 3” stack a wye or a sanitary T? I also asked if I could use an air admittance valve to vent the washer and sink. Can someone please just answer the questions and not point out the obvious things in the picture? I know to use the fernco fittings when transitioning from copper to PVC I am just not sure if I should use a 3x3x2 wye or sanitary T?

  7. #7
    DIY Junior Member dannyd38's Avatar
    Join Date
    Feb 2010
    Location
    Maryland
    Posts
    5

    Default

    Thanks JIMBO!!

    So my only vent option is to go to the roof and tie into the main vent, now for the proper fittings to use and I should be set!

  8. #8
    DIY Senior Member Nate R's Avatar
    Join Date
    Jan 2007
    Location
    Milwaukee, WI
    Posts
    472

    Default

    SanTees should be used to connect horizontal into vertical, Wye Combos are for vertical waste into horizontal.

    Have you seen Terry's pic of proper rough plumbing of a washing machine standpipe? (Pic is work 1K words!)
    Good to see you asking questions like that BEFORE tackling the work!

  9. #9
    DIY Junior Member dannyd38's Avatar
    Join Date
    Feb 2010
    Location
    Maryland
    Posts
    5

    Default

    Thanks Nate!

    I will be using SanTees and I found Terry's pic, I will mirror Terry's pic and somehow vent it to the roof.
    Thanks for all the help!

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
  •