Vent Pipe Distance Above Roof

Its drainage and vent functions are actually two systems.

Vent pipe distance above 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. The re vent is the only exception since it runs horizontally. The epa and other guidelines somewhat follow the standard codes for plumbing vent pipes which generally are vented above the buildings roof. However it needs to be at least six inches above your fixture s flood level to keep from getting wet.

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. Your home s plumbing system is designed to efficiently remove water and waste. 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 vent stack is the pipe leading to the main roof vent.

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. Window or fresh air intake. In other words the highest point within a 10 foot circle of the pipe. 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.

Vent pipes shall terminate not less than 6 inches above the roof measured from the highest point where the vent intersects the roof. On a sink that would be either the rim or overflow hole. Why plumbing air vents are important. A note on the main drain.

Above the roof plumbing vent height.