Your videos are done so well thanks for so much information had to hit the subscribe button 🍻

I had a situation where the only place I could vent the toilet was from behind. It worked quite well, but I couldn't find anything written it the IPC, the UPC, or anywhere on the internet, which described this as being an option. I'm glad to finally see it referenced somewhere!

Great video and explanation. Thanks 😊

Thanks for the lesson.

In the last example, could the wet vent be 2 inch, from the 3 inch combo wye?

Thanks ,my question is if the stack is with in 6 ft of the fixtures do you need to vent them? Small bathroom

Do you have a good example for using 4 in. x 4 in. x 4 in. x 2 in. x 2 in. (Nibco 4870). I imagine is it can combine lavatory, toilet and tub drain and give vertical vent at the same time.

is this for los angeles?

Hacked up by the plumber?? No way😊

Why not just use a San tee for the vent you don’t need the wye.

You cannot vent a toilet in the fashion (horizontally) you have shown at about 4:46 without that vent being a wet vent. With the system you are showing, the vent for the toilet cannot break to horizontal until it is 6” above the flood level of the toilet. In some cases where it is absolutely impossible to vent a toilet or other fixture vertically before reaching the flood level, an inspector may let you do it the way you have shown if you install a cleanout on the vent. But you made no mention of this and your animation does not show a cleanout. You just can’t do it this way without permission and a good reason.