Forum Title: Inlet 90 below toilet not allowed
I'm no plumber but I believe a 90 with a back inlet below a toilet is not allowed. Am I correct?
Category: Plumber Post By: MARK THOMAS (Tyler, TX), 10/27/2016

Not sure what you mean by a back inlet. A low heel outlet 90 after the closet bend 90 is pretty common with the 2 in a vertical or not more than 45 degrees from the vertical position. If you mean installing a 3 x 2 low heal outlet directly below the toilet with the 2 outlet horizontal with the 3 turn, then no you can't do that. draw a picture of what you mean if that doesn't clarify.

- JOHN JOHNSON (Austin, TX), 09/09/2017

Honestly, In 30 yrs I have never seen a side inlet 90 until I just went and looked for one. I have seen side inlet santee. The toilet drops into a 90 before it turns horizontal to the santee. The run of the santee is vertical with the side inlet picking up the tub/shower drain. Someone else was asking a similar question on another forum but got no answers. He had a lead drain with a side inlet vent. A chart I found saw you CANNOT use the side inlet as a vent. That would be something I would check with local codes. That side inlet can become easily fouled and probably not a good way to pipe it. If it because you want to reconnect a vent like the did in the the lead pipe replacement the you are better off installing a 3X2 wye just after the bend. Roll the wye up to 45 from horizontal and make your connection there.

- LEE BURKE (Hendersonville, TN), 09/20/2017

Quote: If you mean installing a 3 x 2 low heal outlet directly below the toilet with the 2 outlet horizontal with the 3 turn, then no you can't do that. That's the answer I was looking for. Thanks . IS a side inlet 90 in that same scenario allowed?

- GEORGIA WOLFE (Fort Smith, AR), 09/28/2017

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