Vent Pipe Distance Above 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.

Vent pipe distance above roof.

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. Vent pipes shall terminate not less than 6 inches above the roof measured from the highest point where the vent intersects the roof. If the pipe is farther than 10 feet from the roof peak it must be 2 feet above the highest point of the roof within 10 feet. All other gas vents shall terminate not less than 2 feet 610 mm above the highest point where they pass through the roof and at least 2 feet 610 mm higher than any portion of a building within 10 feet 3048 mm.

In other words the highest point within a 10 foot circle of the pipe. Above the roof plumbing vent height. On a sink that would be either the rim or overflow hole. The re vent is the only exception since it runs horizontally.

Window or fresh air intake. A note on the main drain. Its drainage and vent functions are actually two systems. However it needs to be at least six inches above your fixture s flood level to keep from getting wet.

The vent stack is the pipe leading to the main roof vent. When builders look only at the table without reading the text they find that a 2 inch diameter drain can run a maximum distance of 8 feet to the vent. 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. The epa and other guidelines somewhat follow the standard codes for plumbing vent pipes which generally are vented above the buildings roof.

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