Venting A Bathroom Sink

If the waste line has a diameter of 1 1 4 inches the vent can be no.

Venting a bathroom sink. A vent is a necessary part of the drain system for any plumbing fixture. In the ipc use a 1 5 sanitary tee upside down or in the upc use a 2 x2 x1 5 san tee upside down to make this connection. This works as long as all the plumbing fixtures connect. That s done with the appropriate sized sanitary tee that s upside down.

The drainpipes collect the water from sinks showers tubs and appliances. From the side angle it becomes easier to imagine what these pipes might look like behind your bathroom or kitchen walls. The vent pipes remove or exhaust sewer gases and allow air to enter the system so that the wastewater flows freely. Clogged venting pipes are why bathroom sink smells like sewer after finding out whether the water was the cause of the sewer like smell probably you have realized this was not the cause.

You thought it was the sink drain but after working on it the problem is not resolved and still bathroom sink smells like rotten eggs. 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. For the purpose of the building and plumbing code a bathroom fixture is a lavatory sink water closet toilet urinal bidet shower stall or bathtub. Install the vent between the sink p trap and the point where the waste line leading from the trap drops to the main sewer.

Use plumber s putty on the drain connections to the sink. If venting through the roof is not an option an air emittance valve can be added at the highest possible place in the cabinet below the sink. Dryfit the pvc drain piping. Notice how the main vent and waste pipe remain separated behind the sink only connecting via the attached went pipe.

Also notice the bathroom sink s individual vent tee s right into the toilet s individual vent. In new construction the simplest way to vent a bathroom group is usually to install a single vertical vent pipe behind the bathroom sink. Both sinks connect at one point sharing a common true vent to the stack. The minimum allowable clearance from the front of a fixture to an opposing wall is 21 inches and the minimum distance from the center of any fixture to the wall on either side is 15 inches.

Its purpose is to equalize pressure in the pipes and prevent a vacuum from forming as the fixture drains. A p trap should be used.