Vent Stack Height Above Roof

Above the roof nor less than one 1 foot.

Vent stack height above roof.

From any vertical surface the soil pipe also known as the vent stack or stack pipe provides air for the plumbing system. Vents in these locations also should extend 610 mm 24 in above a roof. Extension of vent pipes through a roof shall be terminated not less than 12 inches above it. D where the buildingis 4 storeys or less in height the vent pipe terminates above the roof of the building.

12 4 1 extension above roofs. Upc i 906 1 and 906 2. A vent stack is not like a chimney which requires 2 higher than any roof within 10. You are letting air into the plumbing system of the house.

Additionally vent pipes must be at least 305 mm 12 in away from a vertical surface. 4 except for a fresh air inlet where a vent pipe is terminated in open air the terminal shall be located a not less than 1 000 mm above or not less than 3 5 m in any other direction from every air inlet openable window or door. Plumbing code citations for plumbing vent or vent stack clearance distances. Above the roof plumbing vent height.

According to the uniform plumbing code the soil pipe or stack pipe shall extend vertically not less than six 6 inches. The 6 you describe should be just fine. I d maybe try to tie that existing 2 vent into your new 3. I have a main vent and a sink vent and both are only 6 high above the roof.

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. Vent pipes shall terminate not less than 6 inches above the roof measured from the highest point where the vent intersects the roof. Where a roof is to be used for any purpose other than weather protection the vent extensions shall be run at least seven feet above the roof. Each vent pipe or stack shall extend through its flashing and shall terminate vertically not less than 6 inches 152 mm above the roof nor less than 1 foot 305 mm from a vertical surface.

Quoting the irc model plumbing code. The size of the stack vent shall be not less than the size of the waste stack. A stack vent shall be installed for the waste stack.