Some builders recommend a minimum of 30 cm 12 inches.
How high should sewer vent be above roof.
Plumbing books vary in their advice.
Does anyone know what legal height requirements there are for vent pipes from memory i m pretty sure that it must only be a minimum of 300mm above the gutters that s to ensure storm water does not get into the sewer system.
I have a main vent and a sink vent and both are only 6 high above the roof.
The slope is about 4 high for every 12 horizontal.
If the roof area is for people then it is 7 ft above the roofing surface.
The regulations were changed from the days that you needed those 1m or so long pipes jutting from your roof.
Vent pipes shall terminate not less than 6 inches above the roof measured from the highest point where the vent intersects the roof.
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.
A vent terminal and depending if the roof is strictly for weather protection it terminates about 24 above the roof.