(206) 949-5683, Top Rated Plumber, Seattle
Page 1 of 2 12 LastLast
Results 1 to 15 of 17

Thread: Crown-Vented Laundry Drain Trap?

  1. #1
    DIY Junior Member inspectordan's Avatar
    Join Date
    Sep 2012
    Location
    Chicago
    Posts
    1

    Default Crown-Vented Laundry Drain Trap?

    Hi All....great forum! I hope I'm not embarrassing myself by asking but does this laundry drain constitute an improper crown-vented trap or any other defective drain/trap? Thanks!
    Attached Images Attached Images  

  2. #2
    Consultant cwhyu2's Avatar
    Join Date
    Aug 2007
    Location
    Cincinnati OH
    Posts
    1,330

    Default

    Quote Originally Posted by inspectordan View Post
    Hi All....great forum! I hope I'm not embarrassing myself by asking but does this laundry drain constitute an improper crown-vented trap or any other defective drain/trap? Thanks!
    Yes the stand pipe must not have any off sets.

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,653

    Default

    NO. It is done like that anytime there is not room in the stud space for the trap and wall box to fit with a straight riser. How else COULD you do it? A box with the outlet offset to the side would help, but they are not that easy to locate. Don't sweat it.
    Licensed residential and commercial plumber

  4. #4
    In the Trades Tom Sawyer's Avatar
    Join Date
    Nov 2010
    Location
    Maine
    Posts
    2,940

    Default

    You need twice the pipe diameter between the trap elbow and the sanitary tee inlet.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  5. #5
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,653

    Default

    I would say he has about that much center to center, and I have never had an inspector turn down an installation like this one. What do you want him to do, remodel the wall to give more room between the brick and the stud?
    Licensed residential and commercial plumber

  6. #6
    Plumber Winslow's Avatar
    Join Date
    Dec 2005
    Location
    Hawaii
    Posts
    450

    Default

    Quote Originally Posted by hj View Post
    I would say he has about that much center to center, and I have never had an inspector turn down an installation like this one. What do you want him to do, remodel the wall to give more room between the brick and the stud?
    The measurement is taken from the crown weir to the opening in the tee. In that situation the inspector is likely to overlook it.

  7. #7
    In the Trades Tom Sawyer's Avatar
    Join Date
    Nov 2010
    Location
    Maine
    Posts
    2,940

    Default

    It's an S trap. Every inspector in a 200 mile radius of here would make him change it. You do what needs to be done to meet code.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  8. #8
    Plumber Winslow's Avatar
    Join Date
    Dec 2005
    Location
    Hawaii
    Posts
    450

    Default

    Actually he could remove/relocate that stud on the left side to give him the required 2x trap arm required. The offset in the riser is OK as long as the p-trap is set level.

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

    Default

    The "2x diameter" rule does not mean you need 4 inches between the hubs of the fittings. And I may be a little dizzy on chemo, but I don't really see where this is an S-trap.

  10. #10
    In the Trades Tom Sawyer's Avatar
    Join Date
    Nov 2010
    Location
    Maine
    Posts
    2,940

    Default

    Name:  CrownVent.jpg
Views: 637
Size:  70.3 KB

    You need 2 x the pipe diameter between the weir of the trap and the inlet of the tee. What is there ain't even close. It's an S trap with a vent that does nothing to break the siphon. That trap will siphon.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  11. #11
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,653

    Default

    quote; It's an S trap

    That is the most ridiculous statement ever posted here. There is nothing that even approximates an "S" trap in the installation, and it is EXACTLY like thousands, probably tens of thousands, of washer drain installations, with or without the offset in the riser.
    Licensed residential and commercial plumber

  12. #12
    In the Trades Tom Sawyer's Avatar
    Join Date
    Nov 2010
    Location
    Maine
    Posts
    2,940

    Default

    You need to get the code book out and do some reading. I do agree though that there are thousands of them out there just like that and every one of them is ........wrong. How can yo look at that and not see an S trap? If it's because of the vent then again, read the code book.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  13. #13
    Plumber Winslow's Avatar
    Join Date
    Dec 2005
    Location
    Hawaii
    Posts
    450

    Default

    Quote Originally Posted by jimbo View Post
    The "2x diameter" rule does not mean you need 4 inches between the hubs of the fittings. And I may be a little dizzy on chemo, but I don't really see where this is an S-trap.
    I already said it means from the crown weir of the trap to the opening in the san tee. The hubs have nothing to do with it. The same requirement applies to hubless pipe and fittings.

  14. #14
    In the Trades Tom Sawyer's Avatar
    Join Date
    Nov 2010
    Location
    Maine
    Posts
    2,940

    Default

    Name:  CrownVent.jpg
Views: 391
Size:  72.6 KB..........................................
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  15. #15
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,653

    Default

    That is really stretching things to make it an "S" trap. Using that logic, EVERY "P" trap would be an "S" trap if you turn it on its side. You obviously do NOT know the dynamics of a siphon, which a "TRUE S TRAP" uses to be illegal, nor how a vent works. But then, when you turn a P trap on its side, like your drawing, then there is NO trap at all in the drain. Time for you do some remedial classwork, by taking Plumbing 099.
    Last edited by hj; 09-23-2012 at 04:32 PM.
    Licensed residential and commercial plumber

Similar Threads

  1. Laundry drain pipe help for s-trap location. Canada
    By klrman in forum Canadian Plumbing Code Questions
    Replies: 11
    Last Post: 06-03-2010, 02:40 PM
  2. Laundry drain pipe help for s-trap location, Canada
    By klrman in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 11
    Last Post: 06-03-2010, 02:40 PM
  3. Is this water closet drain vented properly?
    By mjsmith0 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 13
    Last Post: 02-15-2010, 02:51 AM
  4. is this drain adequately vented?
    By adrianmariano in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 5
    Last Post: 02-01-2007, 05:41 AM
  5. Laundry Tub with No Visible Trap
    By sbaitso in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 13
    Last Post: 06-05-2006, 10:07 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
  •