Great Wet Vent Sink

This is called a common vent and can be found on back-to-back sinks.

Wet vent sink. Definition of Wet Vent What is a Wet-Vented Plumbing Fixture. Definition of wet vent. The pics installed by a plumber are totally illegal per the UPC and IPC.

The drain for the sink is also the vent for the toilet. 1st Time Bathroom Remodel - Advice on SinkToilet plumbing connections. Theres even a wet vent included that connects to the bathtub.

This next image shows various types of vent piping behind a sink. Any combination of fixtures within two bathroom groups located on the same floor level is permitted to be vented by a vertical wet vent. WET VENTING 90911 Vertical wet vent permitted.

Water runs down the drain line but the vent portion of the piping is dry. When a fixture is close enough to a stack a wet vent might be allowed by code. Wet venting is most common in conjunction with toilets and sinks.

The bathroom sink toilet tub and shower share the same plumbing vent. In the basement this kitchen sinks waste pipe runs vertically about 2 12 to 3 feet away from a PVC pipe for the washer which connects at the basement level to the houses main cast iron wastevent pipe as a drain and then runs up to the second floor where it connects again to the main cast iron wastevent pipe thus venting the washer. A standard plumbing vent pipe is always dry.

With wet venting fixtures that are relatively close to the soil stack the main vertical drain-waste-vent pipe are connected directly to it even if the section of stack above the connection serves as a drain for another fixture. In the case of a tub that is close to a stack its drain can empty into a pipe that also serves as a vent. Typically waste stack piping carries drainage away from sinks tubs and showers.