I'm having some difficulty wrapping my mind around the IPC code requirements for cleanouts. The part that's confusing me is the Exception in IPC 708.1.1:
This is my DWV plan. Only one level. All drain pipes have 1/4" per foot slope.
FD = Floor Drain
FS = Floor Sink
HS = Hand Sink
MS = Mop Sink
Wye-1 to Wye-4 is 2" PVC.
Wye-4 to Wye-6 is 3" PVC.
Wye-6 to the Building Drain is 4" PVC.
There is an existing cleanout in the service corridor behind my suite. This is where I'm connecting my 4" main horizontal branch drain into the existing 4" cast iron building drain that leads to one of the building's grease interceptors. I'll have the current long-turn cast iron elbow at the bottom of that cleanout replaced with a two-way PVC cleanout tee. Besides that, the only other cleanouts I currently have are the removable SJ p-traps for the two hand sinks, where the 1-1/2" trap adapters can be used as cleanout access ports (per IPC 708.1.5 Exception 1.) These will serve as cleanouts for:
It would probably be a good idea to add another cleanout (besides the existing cleanout) on the main horizontal branch drain. Since the main branch drain expands in size from 2" to 3" to 4", I think I should add a cleanout upstream of Wye-1 (where the pipe size is 2") since I imagine it would be difficult to push a snake from the downstream cleanout up past the reducing bushings. Based on where my new partition walls will be located, I could add a cleanout on the 2" fixture drain between FD-1 and the vent connection for FD-1.
Advice and comments (on cleanouts or any other aspect of the design) will be greatly appreciated.
Exception: Horizontal fixture drain piping serving a non-removable trap shall not be required to have a cleanout for the section of piping between the trap and the vent connection for such trap.
This is my DWV plan. Only one level. All drain pipes have 1/4" per foot slope.
FD = Floor Drain
FS = Floor Sink
HS = Hand Sink
MS = Mop Sink
Wye-1 to Wye-4 is 2" PVC.
Wye-4 to Wye-6 is 3" PVC.
Wye-6 to the Building Drain is 4" PVC.
There is an existing cleanout in the service corridor behind my suite. This is where I'm connecting my 4" main horizontal branch drain into the existing 4" cast iron building drain that leads to one of the building's grease interceptors. I'll have the current long-turn cast iron elbow at the bottom of that cleanout replaced with a two-way PVC cleanout tee. Besides that, the only other cleanouts I currently have are the removable SJ p-traps for the two hand sinks, where the 1-1/2" trap adapters can be used as cleanout access ports (per IPC 708.1.5 Exception 1.) These will serve as cleanouts for:
- The horizontal branch drain between HS-1 and Wye-1.
- The horizontal branch drain between HS-2 and Wye-6.
It would probably be a good idea to add another cleanout (besides the existing cleanout) on the main horizontal branch drain. Since the main branch drain expands in size from 2" to 3" to 4", I think I should add a cleanout upstream of Wye-1 (where the pipe size is 2") since I imagine it would be difficult to push a snake from the downstream cleanout up past the reducing bushings. Based on where my new partition walls will be located, I could add a cleanout on the 2" fixture drain between FD-1 and the vent connection for FD-1.
Advice and comments (on cleanouts or any other aspect of the design) will be greatly appreciated.
Last edited: