wye fitting

Forgive me as I’m certain this was asked and answered. I’ve probably read the thread in which it was but for my sanity (sanitee?) I need to double check: This is a p trap for a tub. I plan to use a horizontal wye to branch off for a dry vent, dedicated to the tub. The vent would be 1.5” (I’m in...

Hi there, I'm laying out a bathroom sewer, I have a few wyes connecting sewer branches as well as vent branches. I know that the slope of the run needs to be 1/4"/ft. My question is, does the branch of the wye need to be turned up (22, 45, 60) and then rolled in the direction of the next fixture...

I'm doing a bathroom reno on second floor, and in the process, I'm replacing the bathtub with a shower. The current bathtub drain 1 1/2" ABS it connects with the 3" ABS drain coming from toilet using a 3" wye ABS. I have to cut the wye and install a new one, this time on opposite direction, with...