Plumbing Vent Pipe Height Above Roof

A note on the main drain.

Plumbing vent pipe height above roof.

Open vent pipes that extend through a roof shall be terminated at least 6 inches 152 mm above the roof or 6 inches 152 mm above the anticipated snow accumulation whichever is greater except that where a roof is to be used for any purpose other than weather protection the vent extension shall be run at least 7 feet 2134 mm above the roof. I have a main vent and a sink vent and both are only 6 high above the roof. A vent stack is not like a chimney which requires 2 higher than any roof within 10. I am sure the plumber put it at that height for the inspector.

You are letting air into the plumbing system of the house. On a sink that would be either the rim or overflow hole. The vent is supposed to be 10 away or 2 above any window. The 6 you describe should be just fine.

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. Upc i 906 1 and 906 2. The slope is about 4 high for every 12 horizontal. However it needs to be at least six inches above your fixture s flood level to keep from getting wet.

But it is on the edge of the roof so that should not be a problem. You should be able to cut that vent shorter but stay above the roof line. 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. The re vent is the only exception since it runs horizontally.

All open vent pipes that extend through a roof shall be terminated at least 6 inches 152 mm above the roof and not less than 2 inches 51 mm above the invert of the emergency overflow 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. 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.