ARC
New Member
Hi and thanks. I just need clarification on the UPC dry vent 6" horizontal rule, please.
I have a CI stack in a 1916 house with a side vent at about 36" above the floor. Not code compliant with the current MN UPC code for the vanity that was attached. I'm moving the vanity to the other side of the room and venting it separately, BUT connecting the drain to the main CI stack. For the 36" vent hole I want to connect the alcove tub/shower, and a utility sink in the basement (that was previously connected). The toilet is wet vented since it's within about 1' of the stack.
Question 1. Does code 905.3 UPC mean as long as the vanity has a separate vent, it's fine that it's connected/drains to a stack that has another dry vent at 36"? Or since it's connected to the drain system it's considered a fixture that is less than the minimum 6"? As I read the code (below) it's fine to have the drain tie into the drain of the shower then into the stack since the vanity has its own vent. Please confirm.
Question #2: If this works can do I use a 1.5" wye for the utility sink and shower dry vent connection, or is just a regular T fine? (highlighted in red on plumbing diagram)
If the 36" vent into the stack doesn't work I can tie into the new 1.5" vent for the vanity if needed.
Thanks so much.
905.3 Vent Pipe Rise
Unless prohibited by structural conditions, each vent shall rise vertically to a point not less than 6 inches (152 mm) above the flood-level rim of the fixture served before offsetting horizontally, and where two or more vent pipes converge, each such vent pipe shall rise to a point not less than 6 inches (152 mm) in height above the flood- level rim of the plumbing fixture it serves before being connected to any other vent. Vents less than 6 inches (152 mm) above the flood-level rim of the fixture shall be installed with approved drainage fittings, material, and grade to the drain.
I have a CI stack in a 1916 house with a side vent at about 36" above the floor. Not code compliant with the current MN UPC code for the vanity that was attached. I'm moving the vanity to the other side of the room and venting it separately, BUT connecting the drain to the main CI stack. For the 36" vent hole I want to connect the alcove tub/shower, and a utility sink in the basement (that was previously connected). The toilet is wet vented since it's within about 1' of the stack.
Question 1. Does code 905.3 UPC mean as long as the vanity has a separate vent, it's fine that it's connected/drains to a stack that has another dry vent at 36"? Or since it's connected to the drain system it's considered a fixture that is less than the minimum 6"? As I read the code (below) it's fine to have the drain tie into the drain of the shower then into the stack since the vanity has its own vent. Please confirm.
Question #2: If this works can do I use a 1.5" wye for the utility sink and shower dry vent connection, or is just a regular T fine? (highlighted in red on plumbing diagram)
If the 36" vent into the stack doesn't work I can tie into the new 1.5" vent for the vanity if needed.
Thanks so much.
905.3 Vent Pipe Rise
Unless prohibited by structural conditions, each vent shall rise vertically to a point not less than 6 inches (152 mm) above the flood-level rim of the fixture served before offsetting horizontally, and where two or more vent pipes converge, each such vent pipe shall rise to a point not less than 6 inches (152 mm) in height above the flood- level rim of the plumbing fixture it serves before being connected to any other vent. Vents less than 6 inches (152 mm) above the flood-level rim of the fixture shall be installed with approved drainage fittings, material, and grade to the drain.