Despite my research, I’m not sure if this will work since the trap is so low and at an angle. Also, can I cut off the bottom of the J bend to make it fit in the drain pipe coming out of the floor? Any thoughts on how to improve this before I install it? photo

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Still_Willow2252 t1_j85bu4l wrote on February 11, 2023 at 7:14 PM

Better off not putting in an s trap at all. Look up air admittance valve and follow directions for doing it right.

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

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.

mookmook1 OP t1_j86zva7 wrote on February 12, 2023 at 2:43 AM

Update! Made it a P trap with air admittance valve. Will use primer and pvc cement next. Better?

Edit: added photo

Raleighmo t1_j87f9g8 wrote on February 12, 2023 at 5:00 AM

You did really well! I would double check if you can if your local jurisdiction takes AAV’s as acceptable method instead a true vent thru roof. Either way, this will likely be very effective code issues aside.

mookmook1 OP t1_j88f9dr wrote on February 12, 2023 at 12:35 PM

Thank you! Will check out the code.

bassacre t1_j85phis wrote on February 11, 2023 at 8:48 PM

I think the IPC says youre not supposed to use S traps. Ive never looked it up but Ive never seen anybody install one.

mookmook1 OP t1_j85r50m wrote on February 11, 2023 at 9:00 PM

Thanks, I’m scrapping the S trap based on collective wisdom from the experts in this sub

MoFeaux t1_j86glc6 wrote on February 12, 2023 at 12:10 AM

Ditch the accordion tube as well. Does nothing but collect gunk in the folds.

5degreenegativerake t1_j8790p0 wrote on February 12, 2023 at 4:02 AM

Hard to get away from with the current setup but very easy to get rid of once you have a p trap into a tee like it should be.