SlightlyPoached t1_j85fabe wrote on February 11, 2023 at 7:37 PM

Reply to comment by Still_Willow2252 in Stumped with S Trap installation in tight spot under sink by mookmook1

You very much do not want an s trap. They act as siphons, sucking the water that is supposed to act as a seal for sewer gasses etc down the pipes.

mookmook1 OP t1_j85i7e7 wrote on February 11, 2023 at 7:57 PM

Thank you both. I’m going to Home Depot to get the air admittance valve and going to install that with a p trap. Much appreciated!

browntoe98 t1_j863wd6 wrote on February 11, 2023 at 10:34 PM

I’m in the same situation. My expert recommended checking local code as AAV are not universally accepted. (Just fyi.)

5degreenegativerake t1_j878uox wrote on February 12, 2023 at 4:00 AM

S traps are specifically prohibited by international plumbing code so you are no worse off code wise and much better off real world wise with a P trap and AAV.