BradDIY
New Member
I've learned a lot from these forums, but I'm still unclear on a few things even after reading the Illinois Code and two plumbing books. Please see the attached isometric drawing of my master bath remodel. The additional water closet, washing machine and sink are for an existing bathroom and laundry room on the same floor.
Thank you very much for your help!
1) Wet Vent Toilet
I'm unclear about the horizontal branching connecting to the water closet bend (red text below from the Illinois Plumbing code). Does this mean the horizontal branch (wet vent) from my shower must connect directly below the water closet or can I connect the horizontal branch from my shower to the water closet as shown in the attached pdf? In other words, does the term "water closet bend" imply the entire branch to main drain or another branch?
Section 890.1500 Installation of Wet Venting
f) A single bathroom group of fixtures, consisting of a water closet, lavatory and a bathtub, shower or floor drain, may be installed with the drain from a lavatory serving as a wet vent for a bathtub, shower or floor drain and for the water closet, provided that:
2) Fixture - Horizontal to Trap
I'd like to avoid drilling a hole through my joist in the basement. Also, I have a drop ceiling that's hung about 2 1/2" inch's from the joists. Thus, I'd like the drain for my shower to come down through the floor, go horizontal 8" to the joist (16 o.c.) and then put the union trap under the joist. This makes it into the next bay where I can turn, put the vent in and drop down running 2" to the toilet with a clean out on the end.
Any other words of wisdom are greatly appreciated as well!
Thank you very much for your help!
1) Wet Vent Toilet
I'm unclear about the horizontal branching connecting to the water closet bend (red text below from the Illinois Plumbing code). Does this mean the horizontal branch (wet vent) from my shower must connect directly below the water closet or can I connect the horizontal branch from my shower to the water closet as shown in the attached pdf? In other words, does the term "water closet bend" imply the entire branch to main drain or another branch?
Section 890.1500 Installation of Wet Venting
f) A single bathroom group of fixtures, consisting of a water closet, lavatory and a bathtub, shower or floor drain, may be installed with the drain from a lavatory serving as a wet vent for a bathtub, shower or floor drain and for the water closet, provided that:
1) Not more than four DFUs drain into a 2-inch diameter wet vent; and
2) The horizontal branch is a minimum of 2 inches and connects to the stack at the same level as the water closet drain. The horizontal branch may also connect to the water closet bend. (See Appendix K.Illustration S.)
2) Fixture - Horizontal to Trap
I'd like to avoid drilling a hole through my joist in the basement. Also, I have a drop ceiling that's hung about 2 1/2" inch's from the joists. Thus, I'd like the drain for my shower to come down through the floor, go horizontal 8" to the joist (16 o.c.) and then put the union trap under the joist. This makes it into the next bay where I can turn, put the vent in and drop down running 2" to the toilet with a clean out on the end.
Any other words of wisdom are greatly appreciated as well!