Kitchen Sink Drain Plumbing Vent

In most cases it s a vertical pipe that ties into the main vent stack which goes through the roof.

Kitchen sink drain plumbing vent. Obviously a vent pipe in a kitchen island can t do that. Without venting the negative pressure caused by the flow of draining water can potentially suck water out of the drain trap and allow sewer gases to enter the home. Just as drain pipes remove water and waste from your home the plumbing vent pipe also known as a plumbing air vent removes gas and odors. Its purpose is to equalize pressure in the pipes and prevent a vacuum from forming as the fixture drains.

Additionally the vent can be no farther than 6 feet from the weir of a standard 1 1 2 inch trap. Plumbing drains require proper venting typically through pipes that extend to the roof to allow air into the drain lines to equalize the pressure and allow gray water to drain. A regular kitchen sink adjacent to a wall has a vent hidden in the wall that connects to the drain. When installing your vents it s highly recommended that you plan out your drain lines to minimize the risk of clogging.

If you don t have a vent on your sink drain you can use one of these air admittance in line vents from oatey here. Behind the wall where you can t see a vent line and drainpipe lead to a soil stack which is the control center of the wastewater system. A vent is a necessary part of the drain system for any plumbing fixture. Both kitchen 1 1 2 inches and bathroom 1 1 4 inches are smaller than the rest of the drain system on purpose.

Drain pipes take the wastewater to the soil stack. So it won t plug up the vent must rise six inches above the overflow level of the sink before the pipe goes horizontal. Through the stack sewer gases are carried up to the roof through vent lines. Http amzn to 2uuxg5o quick video explain.

The drain in every plumbing fixture in your house including all the sinks must include a vent. Kitchen sink venting the p trap must be vented and the vent connection should be as close to the trap as possible but no closer than two pipe diameters which is 3 inches for a 1 1 2 inch trap.