Michael P Reilly
Member
Hello all, my laundry is complete and demo begins on 4 other rooms next weekend. One of my tasks coming up will be to figure out the DWV routing for a dual bathroom group. The existing conditions include a single 2" vent pipe through the roof and a 3" drain line that I will be draining to. Everything in between is getting ripped out. I know I will be doing a horizontal wet vent system and that each fixture drain needs to connect individually. I am on Florida's version of IPC.
My question is about a lavatory. Every picture I have ever seen had a vent pipe directly connected above the fixture drain for the lav. My problem is that where this is to be installed is directly under a window on a masonry wall and the sink cabinet is flanked by drawer cabinets on both sides. This means unless I change something (which if I have to I have to and will figure out) I need to go down. The existing vent is on the wall beside one of the flanking drawer cabinets.
What I am envisioning is that the 2" vent pipe would go from roof penetration straight down through wall and floor and then bend toward the eventual 3"drain. The lav fixture drain (after the trap) would go to the wall behind the sink and then 90 bend down through the floor, bend again towards the vent pipe and connect to the horizontal pipe thus creating the beginning of the wet vent. My understanding for IPC is that I have 5' developed length to make that happen. The next connection would be the toilet so it upsizes to 3" from there on.
I can't find a picture representing this sort of setup so I am asking if this is allowed.
please excuse the crude paint sketch. I have CAD drawings at work that I will create some images to go with this tomorrow but I wanted to get the ball rolling today. Thanks in advance for any knowledge shared.
My question is about a lavatory. Every picture I have ever seen had a vent pipe directly connected above the fixture drain for the lav. My problem is that where this is to be installed is directly under a window on a masonry wall and the sink cabinet is flanked by drawer cabinets on both sides. This means unless I change something (which if I have to I have to and will figure out) I need to go down. The existing vent is on the wall beside one of the flanking drawer cabinets.
What I am envisioning is that the 2" vent pipe would go from roof penetration straight down through wall and floor and then bend toward the eventual 3"drain. The lav fixture drain (after the trap) would go to the wall behind the sink and then 90 bend down through the floor, bend again towards the vent pipe and connect to the horizontal pipe thus creating the beginning of the wet vent. My understanding for IPC is that I have 5' developed length to make that happen. The next connection would be the toilet so it upsizes to 3" from there on.
I can't find a picture representing this sort of setup so I am asking if this is allowed.
please excuse the crude paint sketch. I have CAD drawings at work that I will create some images to go with this tomorrow but I wanted to get the ball rolling today. Thanks in advance for any knowledge shared.