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.

Let s look at a couple of examples. 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. 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. Above the roof nor less than one 1 foot.

However it needs to be at least six inches above your fixture s flood level to keep from getting wet. 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. A note on the main drain. Many people mistakenly think that the pipe always has to be 2 feet above the roof peak.

Above the roof plumbing vent height. According to the uniform plumbing code the soil pipe or stack pipe shall extend vertically not less than six 6 inches. We install our roof vents 6 to 8 inches above the roof line. Flagpoling of vents shall be prohibited except where the roof is used for assembly purposes or parking.

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. For 18 feet of run you would have a rise of 72 inches. The re vent is the only exception since it runs horizontally. On a sink that would be either the rim or overflow hole.

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. This may seem suitable since the only purpose for the stack is to provide air and expel sewer gases.