Hello I renovated my kitchen and had plumbing moved and replaced. Didn’t really think about the height of the waste pipe before cabinets sink and countertop went in. With new sink and disposal installed, I’m afraid my p-trap is too high in order to line up with the waste drain. This is what I did in the attached picture. Is anything wrong with my setup?

enter image description here

Thanks everyone for your responses so far. I’ve attached a slightly better pic which shows where the waste pipe is. I will get dimensions once I get back tonight. Nothing is glued yet so I can’t say it’s leaking. I was hoping I could get some advice before it gets glued.

enter image description here

  • Hello, and welcome to Home Improvement. It isn't clear from the picture what's going on; would you add a picture and dimensions? Sep 29, 2020 at 0:40
  • Are you asking because this set up is leaking?
    – Kris
    Sep 29, 2020 at 0:54
  • 1
    We can't see where the drain pipe coming out of the wall is, but it appears that it is above the disposer. Hint: gravity is a critical issue for sewer and drain configuration... Sep 29, 2020 at 1:37
  • I think the upstand is an AAV and presume the outflow is slightly below the end of the trap.
    – Jasen
    Sep 29, 2020 at 6:40
  • 1
    If the top of the elbow coming out of the trap is higher than the top of the pipe where it enters the wall you should be fine. Preferably, you want a 1/4" per foot slope from the high end to the low end, but so long as you've got some slope, you'll be OK.
    – FreeMan
    Sep 29, 2020 at 13:53

1 Answer 1


With the new photo your trap appears to be perfect. I find that traps have a fairly large operating range the important thing is that they hold water and yours will hold enough water to prevent sewer gas from backing up into the home. If you are having any issues let us know but with the air admittance valve and your setup I don’t see any problems.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.