Plumbing Vent Height Above Roof

From the irc and other plumbing codes.

Plumbing vent height above roof.

Roof surface distance to plumbing vent. Nearest vertical surface distance to plumbing vent. Used most commonly at an island sink or vanity the vents are also located in the attic to prevent the roof penetrations as seen above on the front roof line elevation. Open vent pipes that extend through a roof shall be terminated not less than 6 inches 152 mm above the roof.

In the event that your walls do not leave enough space for any of the above vents. Measure from the up roof side. The slope is about 4 high for every 12 horizontal. How high should the plumbing vents be above there roof.

Vents within 10 feet 3048 mm of a part of the roof that is used for assembly purposes or parking shall. 6 inches above nearest roof surface nearest accommodates sloped roof i e. 4 except for a fresh air inlet where a vent pipe is terminated in open air the terminal shall be located. 12 inches from nearest vertical surface.

Think about it when have you ever seen a plumbing vent on the front roof line. I have a main vent and a sink vent and both are only 6 high above the roof. This is best implemented if a fixture rests close to the stack and the top floor of your home allowing the stack to serve as a vent. Flagpoling of vents shall be prohibited except where the roof is used for assembly purposes or parking.

P3103 1 roof extension. Plumbing vent height above sloped roof. Where a roof is to be used for assembly or as a promenade observation deck sunbathing deck or similar purposes open vent pipes shall terminate not less than 7 feet 2134 mm above the 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.

Open vent pipes that extend through a roof shall be terminated at least 6 inches 152 mm above the roof or 6 inches 152 mm above the anticipated snow accumulation whichever is greater except that where a roof is to be used for any purpose other than weather protection the vent extension shall be run at least 7 feet 2134. 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. In sizebefore penetrating a wall or roof and d where the buildingis 4 storeys or less in height the vent pipe terminates above the roof of the building. The true vent is aligned vertically and attaches to your drain line through the roof.

Such as the side wall of an upper story on the building.