(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 8 of 8

Thread: Basement rough plumb - what's this?

  1. #1

    Default Basement rough plumb - what's this?

    A guy on JB's forum had this pic of his basement bath rough in. Anyone know what the yellow arrow's pointing to?
    Attached Images Attached Images  
    (important note: I'm not a pro)

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,679

    Default thing

    It is the "blockout" box for the tub or shower "P" trap.

  3. #3

    Default

    Thanks, HJ. Knew you'd be here
    Why is that required? Why can't you just cement the ptrap in like everything else?
    (important note: I'm not a pro)

  4. #4
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    At the slab-pour stage, you have no way to accurately detemine the exact final placement of the trap....your rough sill plates and walls are not even set at that time. The final location of the trap can be set inside this box once your rough framing is up.

  5. #5

    Default

    Thanks Jimbo!
    (important note: I'm not a pro)

  6. #6
    DIY Senior Member v1rtu0s1ty's Avatar
    Join Date
    Sep 2006
    Location
    Chicago IL
    Posts
    176

    Default

    Thanks phrashter for posting the pic here. Am now a member of terrylove too.

    By the way, I'm a visual type of person. What is a P trap?

  7. #7
    DIY Senior Member v1rtu0s1ty's Avatar
    Join Date
    Sep 2006
    Location
    Chicago IL
    Posts
    176

    Default

    I did a google image search and saw those P-traps

    From what I'm currently seeing in my basement, I have to make a big square cut on that black plastic. Am I correct?

  8. #8
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,679

    Default thing

    First you have to understand that most of the lower portion of a tub drain is below the floor so that big box gives you room for it. It also may give you room to cut the trap off and repipe a new trap if it has to move to a different, nearby, location to line up with the bathtub.

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
  •