The reason for this is so than there are no foul or gas entering the house so that there are no illnesses occurring.
Soil vent pipe height above flat roof.
Through the stack sewer gases are carried up to the roof through vent lines.
Depending on your region the vent stack may protrude only a few inches above the surface of the roof.
All the faucets and water appliances in a house use this same system of drains pipes and vents.
Upc i 906 1 and 906 2.
All open vent pipes that extend through a roof shall be terminated at least number typically 6 inches mm above the roof 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.
The vent pipe cover is a systematic and secure solution that provides both a watertight flashing of the roofing membrane and an airtight extension of the soil pipe above the roof.
A soil vent pipe svp also known as a soil stack pipe drain waste vent or ventilated discharge pipe is typically a vertical pipe that removes sewage and greywater from a building it is often attached to the exterior of a building although it may be fitted internally and connects the subterranean drainage system to a point just above the level of the roof gutter.
This may seem suitable since the only purpose for the stack is to provide air and expel sewer gases.
The soil pipe also known as the vent stack or stack pipe provides air for the plumbing system.
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.
Drain pipes take the wastewater to the soil stack.
What is the minimum requirement for a soil vent above the window or roof the minimum a soil pipe should be above an opening area is 100mm.