Return to the Plumbing Forum | Post a Follow-Up

 o
Is there a maximum distance from the shower floor to the P trap

Posted by jimbor (My Page) on
Tue, Mar 8, 11 at 20:13

bottom that is specified by code? The local building inspectors advised me that maximum drop was 8 inches; another inspector there was no maximum particularly for traps beneath the first floor, although you shouldn't exceed 24 inches. This is very frustrating. Apparently there is concern that the P trap could wash out if water falls to far through a long vertical drain. Any input would be appreciated. Thanks.


Follow-Up Postings:

 o
RE: Is there a maximum distance from the shower floor to the P tr

Under both the IRC & UPC the maximum length of the tailpiece is 24" vertical from the finished edge of the drain opening to the standing water level in the trap except washer standpipes.

Under the UPC a washer standpipe must be 18" but not more than 30"

Under the IRC a washer standpipe must be 18" but not more than 42"

ref:

IRC-3201.6 & 2706.2

UPC 1001.4 & 804.1


 o
RE: Is there a maximum distance from the shower floor to the P tr

"tailpiece" in the above post means drain tailpiece, the vertical pipe in question. (the term tailpiece also occurs in discussions of P traps; then it is the horizontal pipe downstream of the P trap. F.y.i.)


 o
RE: Is there a maximum distance from the shower floor to the P tr

The trap tailpiece is not the horizontal pipe downstream of the P-trap.

The horizontal pipe extending from the trap weir to the end of the trap assembly is the trap tailpiece.

The discharge end of the trap tailpiece may be shortened but it may not be lengthened with tubular fittings. The trap tailpiece must be connected to the Trap adapter on the end of the drain fixture arm.

Photobucket


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Plumbing Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here