tee-wye

Ran into a couple issues while testing out the drain configuration I came up with for a double vanity retrofit (Note: I had to make the decision early on to split the waste line in the vanity as opening up the plumbing wall to get dedicated lines into the stack was not practical [shared wall...

First pic shows what I believe would be a standard install. P-Trap + P-Trap elbow, connected to a vent. Second pic shows using a sanitary tee RATHER than the elbow that came with the P-Trap, functioning as both the P-Trap elbow and as the vent coming out the top. Are there any issues with this...

Hello , I'm trying to get to the bottom of what appears to be an elusive subject on code compliance and industry jargon. Specifically, I want to know what Nibco cast DWV Tee-Wye fitting(s) (if any) will satisfy the code requirements wherever a "Tee-Wye fitting with an eight-bend, or combo...