Vent Pipe Distance Above Roof

Why plumbing air vents are important.

Vent pipe distance above roof.

In other words the highest point within a 10 foot circle of the pipe. The vent stack is the pipe leading to the main roof vent. Window or fresh air intake. Its drainage and vent functions are actually two systems.

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. New york state just raised plumbing vent pipe code from 12 inches to 18 inches above the roof and at least 10 feet horizontal distance from any opening to the building i e. Vent pipes shall terminate not less than 6 inches above the roof measured from the highest point where the vent intersects the roof. They may also see that the slope column references 1 4 inch per foot but they are likely to assume that it s just reiterating the minimum allowable slope for a 2 inch drain.

However it needs to be at least six inches above your fixture s flood level to keep from getting wet. The re vent is the only exception since it runs horizontally. Above the roof plumbing vent height. Where a roof is used for any purpose other than weather protection vents shall extend at least 7 feet above the roof and shall be properly supported.

It channels the exhaust gases to the vent and helps maintain proper atmospheric pressure in the waste system. On a sink that would be either the rim or overflow hole. The epa and other guidelines somewhat follow the standard codes for plumbing vent pipes which generally are vented above the buildings roof. A note on the main drain.

Your home s plumbing system is designed to efficiently remove water and waste.