I'm confused as to how to dry vent a shower. I've installed plenty of san tee's for sinks. In these cases the vent goes straight up the wall and doesn't turn horizonal until 6 inches above the flood level rim.

Thanks Bern. How does that work with flood level rim issue?

it is allowed due to necessity


if however the drain is NOT in the center of the pan but is near the wall then one can go straight up with the vent


this is WHY showers (and tubs) are almost always 'against a wall'

That seems like the vent would get clogged easily from a backup in the main line, especially being in the basement. I spend a lot of time on this forum, and I have never read about a clogged shower vent. Do plumbers put a clean out on this vent?

Does the vent need to go into the wall and up vertical as soon as it can? or can it travel across the bathroom under the concrete floor for say 6 feet and then up the wall? Seems like going up vertical asap would be best but I'm curious and it would save on drilling through a bunch of studs.

Does the vent need to go into the wall and up vertical as soon as it can?


exactly / ASAP

You also need to use "drainage fittings"(no vent 90*s) until you're 6" above flood level.