How many fixture units can a 2-inch vent handle?
24 fixture units
The Plumbing Code states that a vent can handle 24 fixture units.
Does a shower need a vent line?
Vent Pipe Requirements for Showers The vent pipes remove sewer gases while allowing air into the system to help the water drain. Without a vent, your shower won’t drain correctly. While a shower usually requires a 2-inch drain pipe, the vent pipe must be either 1 1/2 inches or 2 inches depending on local requirements.
How far can a shower be from a vent?
The connection between the fixture drain and the horizontal drain and vent pipe is the only vertical pipe of a combination drain and vent system. 8 feet is the maximum vertical distance.
How big of a vent do you need for a shower?
It’s important to realize a pipe that’s 1.5 inches in diameter is sufficient to vent any residential fixture. But understand that some plumbing codes have very specific sizing requirements. The horizontal white PVC pipe at the bottom of the photo held up by the j-hook is a drain pipe for a shower.
Where to put drain and vent lines in a bathroom?
Drain and vent lines must be positioned precisely, so you should install them before the supply pipes. It may be possible to simplify supply runs by moving a vent pipe over a few inches.
Where does the Revent pipe attach to the drain line?
A revent pipe, also called an auxiliary vent, attaches to the drain line near the fixture and runs up and over to the main vent. It may attach directly behind the fixture or to the horizontal drain line.
How big of a vent do I need for a 2 inch drain?
It’s common to use a 1 1/2-inch vent for a 2-inch drain because that ensures that the drain will get enough air. That size vent on a 2-inch drain must be no more than five feet from the fixture P-trap — the distance varies according to drain and vent diameters — and it must rise vertically until it is above the overflow line of the fixture.
What’s the proper venting for a shower drain?
This configuration adds another 6″ or so to the horizontal vent. Both the vent and the wye are sloped downward toward the drain. The 90 ell can be dropped maybe another 1/2″, but the p-trap is right there. Dropping it any lower would put the trap out of kilter. I will swap the two 90’s in the wall for two 45’s, eliminating that horizontal vent.
Drain and vent lines must be positioned precisely, so you should install them before the supply pipes. It may be possible to simplify supply runs by moving a vent pipe over a few inches.
Can a shower vent be run at a 45 degree angle?
NO part of the vent can be run at less than a 45 degree angle until it reaches a level at least 6″ above the flood rim of the highest fixture. I agree it is not the beest configuration but Uniform Plumbing code allows flat venting due to structural conditions, check your local building department.
A revent pipe, also called an auxiliary vent, attaches to the drain line near the fixture and runs up and over to the main vent. It may attach directly behind the fixture or to the horizontal drain line.
