Vent Pipe Height Above Roof

For those stinky vents consider installing odor hog vent caps see image on the roof vents.

Vent pipe height above roof. According to the uniform plumbing code the soil pipe or stack pipe shall extend vertically not less than six 6 inches. However it needs to be at least six inches above your fixture s flood level to keep from getting wet. This may seem suitable since the only purpose for the stack is to provide air and expel sewer gases. We install our roof vents 6 to 8 inches 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. Flagpoling of vents shall be prohibited except where the roof is used for assembly purposes or parking. Single wall metal pipe shall terminate at least 5 feet 1524 mm in vertical height above the highest connected equipment draft hood outlet or flue collar. On a sink that would be either the rim or overflow hole.

Above the roof nor less than one 1 foot. Single wall metal pipe shall extend at least 2 feet 610 mm above the highest point where it passes through a roof of a building and at least 2 feet 610 mm higher than any portion of a building within a horizontal distance of 10 feet 3048 mm. You are close to your eave and you find that your measurement is 18 feet from peak to penetration on a 4 12 pitch see figure 3. 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.

For 18 feet of run you would have a rise of 72 inches. A note on the main drain. Vent pipes shall be extended separately or combined of full required size not less than 6 inches 152 mm above the roof or fire wall. Let s look at a couple of examples.

From any vertical surface the soil pipe also known as the vent stack or stack pipe provides air for the plumbing system. Upc i 906 1 and 906 2.