Forum Title: Kitchen drain line pitch problem
I've installed a new countertop and sink. The new sink is slightly deeper than the old, causing my p trap outlet to be at or below the level of my waste line port. I have access to the crawlspace, and I'd like to send the kitchen drain line through the floor, and have it join the vent line a few feet after it does now. This will cause the waste line to run vertically through the floor after the p trap. Is there any reason a shouldn't have the line running vertically? I know 1/4" per foot is the correct pitch, and more than 1/2"-45┬░ is bad. Is 90┬░ acceptable? Will is cause a siphon, or a flooded condition at the elbow where vertical turns back to horizontal? Thanks. I can't find anywhere that says this is OK, nor anything that says it isn't.
Category: Plumber Post By: LEONA GROSS (Bloomington, IL), 02/17/2017

Quote: Originally Posted by frodo this guy just lowered his drain, the correct wayhttp://www.plumbingforums.com/forum/...ad.php?t=11595 it is called an S trap and it is illegal WHY? the water will siphon out of the trap and sewer gas will make your house smell like someone farted post a picture, lets see what we can think of So it's not an s trap exactly. The existing drain port is fully an inch higher than my p trap output. So that's out. Below is what I propose to do(roughly) Thanks for looking

- CHRIS GUTIERREZ (Redlands, CA), 09/08/2017

That is still an s trap. You have no vent.

- ALFRED MORRISON (Oakland Park, FL), 09/09/2017

this guy just lowered his drain, the correct wayhttp://www.plumbingforums.com/forum/...ad.php?t=11595 it is called an S trap and it is illegal WHY? the water will siphon out of the trap and sewer gas will make your house smell like someone farted post a picture, lets see what we can think of

- CONNIE REYNOLDS (Salem, OR), 10/07/2017

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