My county uses the 2018 IPC. I am in the process of installing underslab DWV and a have a few questions:
My trunk line is fairly deep to accommodate the kitchen sink which is 50+ feet on the other side of the house. I am planning to run all of my fixture drain lines and vents at a more shallow depth turning down into the trunk lines using wyes with street 45s, turned vertically or rolled.
1. For the Master toilet vent line I am planning to use a 3” x 2” wye with street 45 turned vertically, then 90 over (medium bend) to the exterior wall, 90 up (LS 90) in the top 1.5 courses of CMU, then the 2” VTR. The top of the pipe will only be a few inches below the slab. See attached fitting layout. For the sink I plan to use a sanitary tee in the VTR to catch the sink trap arm. Since it will be 4’-9” between the two, I will re-vent a 1.5” line above the ceiling, or maybe consider using a 2” trap arm line.
Is this acceptable?
2. For the Master shower I will be using a HC accessible shower with a low threshold, so for extra precaution I am also putting a FD just outside the shower. The shower & FD will drain down vertically into the trunk line as described above. The shower vent will run to the back wall then tie to the 2” VTR above the ceiling. See attached fitting layout.
Is this acceptable?
3. And regarding the P-traps, which orientation is correct (see attached)? Does it even matter?
Thanks in advance.
My trunk line is fairly deep to accommodate the kitchen sink which is 50+ feet on the other side of the house. I am planning to run all of my fixture drain lines and vents at a more shallow depth turning down into the trunk lines using wyes with street 45s, turned vertically or rolled.
1. For the Master toilet vent line I am planning to use a 3” x 2” wye with street 45 turned vertically, then 90 over (medium bend) to the exterior wall, 90 up (LS 90) in the top 1.5 courses of CMU, then the 2” VTR. The top of the pipe will only be a few inches below the slab. See attached fitting layout. For the sink I plan to use a sanitary tee in the VTR to catch the sink trap arm. Since it will be 4’-9” between the two, I will re-vent a 1.5” line above the ceiling, or maybe consider using a 2” trap arm line.
Is this acceptable?
2. For the Master shower I will be using a HC accessible shower with a low threshold, so for extra precaution I am also putting a FD just outside the shower. The shower & FD will drain down vertically into the trunk line as described above. The shower vent will run to the back wall then tie to the 2” VTR above the ceiling. See attached fitting layout.
Is this acceptable?
3. And regarding the P-traps, which orientation is correct (see attached)? Does it even matter?
Thanks in advance.