Vent Pipe Length Must Extend Through Roof

It s common practice in many states to reduce the soil stack to 2 inches and extend that 2 inch pipe through the roof.

Vent pipe length must extend through roof.

The vent stack is the pipe leading to the main roof vent. It also allows fresh air into the plumbing system to help water flow smoothly through the drain pipes however no water runs through the plumbing vent pipe. Vent pipes should extend to outdoors above the building roof and should terminate vertically not less than 6 above the roof surface nor more than 24 and must be at least 12 from any vertical surface such as a nearby sidewall. Vents in these locations also should extend 610 mm 24 in above a roof.

Relief vents for soil and waste stacks in buildings having more than 10 branch intervals shall be sized in accordance with. All open vent pipes that extend through a roof shall be terminated at least number typically 6 inches mm above the roof except that where a roof is to be used for any purpose other than weather protection the vent extensions shall be run at least 7 feet 2134 mm above the roof. Additionally vent pipes must be at least 305 mm 12 in away from a vertical surface. All vent pipes shall extend in size above the roof or shall be reconnected with the soil or waste stack vent of proper size at a point below the roof one 1 the vent through the roof vstr shall be increased pipe size above the reconnection point of stack vent and horizontal vent.

Pvc schedule 40 pipe is used to vent waste lines for toilets and drain lines for sinks and washing machines. How to extend pvc pipe on a roof vent. It is a vertical pipe attached to a drain line and runs through the roof of your home. Vents exceeding 40 feet 12 192 mm in developed length shall be increased by one nominal pipe size for the entire developed length of the vent pipe.

Vent pipes shall not be less than 1 1 4 inches 32 mm in diameter. Upc i 906 1 and 906 2. In locations known for snow the vent pipe needs to be at least 51 mm 2 in in diameter and 305 mm inside an insulated area of a building before extending through the roof.