Canada_DIY_Plumber
New Member
I've been asking a few questions and have greatly appreciated the pointers. I'm putting in a bathtub on a concrete slab. The bathtub will have a dedicated dry vent (not part of a wet vent system.) I'm having a hard time figuring out how to get this vent into the plumbing wall given the rule that I am not supposed to have any horizontal sections of vent until I get above the overflow level of the tub. I tie into the sewer line at the far end of the tub so my preference is to avoid a 90 degree bend if I can avoid it.
Here are two options. Blue is drain, green is vent, black is outline of tub area, and grey is outline of plumbing wall.
The red option gives me a nice straight drain run from the tub drain to where I enter the main sewer line. However, since the vent taps in at the far end of the p-trap, I have a height challenge to get it back to the plumbing wall without having a horizontal section of vent pipe.
In this youtube video, at 4:45, it appears that they have a horizontal section of vent pipe to deal with this issue. Is that allowed?
The purple option solves that issue by setting the p-trap parallel to the plumbing wall. However, then I have to make a 90 degree turn (and some additional turns further down the drain) to meet up with the sewer which seems suboptimal.
Any thoughts on which would be preferred (or another option entirely)?
Here are two options. Blue is drain, green is vent, black is outline of tub area, and grey is outline of plumbing wall.
The red option gives me a nice straight drain run from the tub drain to where I enter the main sewer line. However, since the vent taps in at the far end of the p-trap, I have a height challenge to get it back to the plumbing wall without having a horizontal section of vent pipe.
In this youtube video, at 4:45, it appears that they have a horizontal section of vent pipe to deal with this issue. Is that allowed?
The purple option solves that issue by setting the p-trap parallel to the plumbing wall. However, then I have to make a 90 degree turn (and some additional turns further down the drain) to meet up with the sewer which seems suboptimal.
Any thoughts on which would be preferred (or another option entirely)?