Vent Pipe Distance Above Roof

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 pipe distance above 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. The vent stack is the pipe leading to the main roof vent. In other words the highest point within a 10 foot circle of the pipe.

Why plumbing air vents are important. The re vent is the only exception since it runs horizontally. 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. 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.

On a sink that would be either the rim or overflow hole. Window or fresh air intake. 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.

A note on the main drain. The epa and other guidelines somewhat follow the standard codes for plumbing vent pipes which generally are vented above the buildings 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. It channels the exhaust gases to the vent and helps maintain proper atmospheric pressure in the waste system.

Above the roof plumbing vent height.