What are the code requirements for plumbing vent terminations?
Tuesday, June 19, 2018
The plumbing drain system in a home has to “breathe” in air so it can flow smoothly. But the vent piping can also emit noxious sewer gas, so it is necessary to terminate the pipes in a safe location where the sewer gas will not come back into the house.
A vent through the roof must terminate a minimum of 6 inches above the roof surface or 6 inches above any anticipated snow accumulation. Vents through walls have to terminate at least 10 feet above the ground or adjacent surface, but cannot be below a vented soffit.
When a vent terminates directly below a window, door, or air intake, it must be at least 4 feet under it or 3 feet above it, unless the vent is 10 feet or more away. Vents are also required to be at least 7 feet above a roof when it is also used as a walking surface.
Vent terminations near any air intakes on a roof must be a minimum of 3 feet above the intake opening, or at least 10 feet away.
Vents terminating at an air admittance valve in an attic must be a minimum of 6 inches above the insulation.
Side wall vents are required to be protected from entry of birds or rodents, usually by a coarse mesh screen. Also, the use of vent terminations for anything other than vent termination is prohibited.
These standards are at Section “P3103 - Vent Terminals” of the Residential Edition of the Florida Building Code (FBC) and the International Residential Code (FBC).
• • • • • • • • • • • • • • • • • • • • • • • • • • • •
Here’s links to a collection of our other blog posts about PLUMBING:
How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manfuactured and modular homes
of Blog Posts
Top 5 results given instantly.
Click on magnifying glass
for all search results.