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The distance from my sink's trap weir to its connection to the drain/vent fitting is 9 feet, so using 2" diameter at 1/4 slope exceeds the physics and code. However ... is it legal under IPC to start with a 2" diameter trap arm (starting from the trap weir at 1/4" slope) and then after 6 feet...

I'm under IPC. Is connecting a non-bathroom sink (a bar sink) at the location shown in the attached diagram allowable?

Are lavatory trap arms subject to IPC's 708.1.4 Changes of Direction code rule and its cleanout rules? For example, suppose a lavatory sink cabinet is unable to center itself to the existing stubbed out drain pipe and vent connection. Assuming my trap arm total length is not longer than...

Under IPC, would a 1st-floor sink draining into the waste stack from the 2nd floor (with 2nd-floor fixtures) be code-compliant if it uses an AAV (Air Admittance Valve)? Or does an AAV not really eliminate the wet venting violation ... e.g., would it still be deemed a wet vent code violation...

As I understand it, the prohibition of dead ends that used to be in the IPC has been removed. The old IPC definition for a dead end was: DEAD END. A branch leading from a soil, waste or vent pipe; a building drain; or a building sewer, and terminating at a developed length of 2 feet (610 mm)...

I believe I have discovered a major mistake by the homebuilder of my house and am seeking advice on how to proceed. My unfinished basement floor is below the elevation of the manhole cover of the next upstream manhole. All my upper floors are above the elevation of the manhole cover of the next...

I have space in the ceiling cavity area directly above my HVAC system (furnace & AC) in my basement to run new PEX/plumbing lines, and I would like to run my PEX lines that need to cross from one side of my basement to the other side in this open area that is directly above the HVAC system...

As shown in the diagram, I have a SoW stack that serves the 1st floor of my two story house. I have 3 SoW stacks in total. All of my 1st-floor fixtures connected to this SoW stack are true vented (their traps are not shown). I would like to add in the basement in a finished "craft room", a...