Can 2 drains share a vent?

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. It can then run horizontally to tie into another vent, as long as it maintains a 1/4-inch-per-foot slope toward the drain.

What plumbing fixture does not require a vent?

Definition of Direct Venting of Plumbing Fixtures But if a plumbing fixture is close enough (five feet or less) to the main waste stack pipe (vent), the fixture does not usually require its own plumbing vent piping, and it is considered a direct-vented plumbing fixture.

When do you tie in a plumbing vent stack?

Individual vents must rise above the overflow line of the topmost plumbing fixture in the house before you can tie it to the main vent stack. This is a precaution that prevents the vent from becoming a drain if that fixture’s drain gets blocked.

Where do you attach a vent to a drain line?

While the true vent is simple, it isn’t always a possible solution since fixtures are rarely located so close to the stack. Re-vent pipes, otherwise known as auxiliary vents, attach to the drain line near your fixture. They run upwards and over the main vent. They can attach right behind your fixture or horizontally to the drain line.

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.

Can a wet vent be shared with two fixtures?

Certain fixtures can be wet-vented, this means two fixtures share a common vent, but since I can’t be at your house to mentor you on this complex technique, just install separate vents for each fixture.

Individual vents must rise above the overflow line of the topmost plumbing fixture in the house before you can tie it to the main vent stack. This is a precaution that prevents the vent from becoming a drain if that fixture’s drain gets blocked.

While the true vent is simple, it isn’t always a possible solution since fixtures are rarely located so close to the stack. Re-vent pipes, otherwise known as auxiliary vents, attach to the drain line near your fixture. They run upwards and over the main vent. They can attach right behind your fixture or horizontally to the drain line.

Certain fixtures can be wet-vented, this means two fixtures share a common vent, but since I can’t be at your house to mentor you on this complex technique, just install separate vents for each fixture.

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.