What Is a Vertical Wet Vent

The vertical wet vent shall be considered to be the vent for the fixtures and shall extend from the connection of the dry vent down to the lowest fixture drain connection. … Other fixture drains shall connect above or at the same elevation as the water closet fixture drains.

What is the purpose of a wet vent?

The official definition of a wet vent is a pipe that serves as a waste pipe and a vent at the same time. The wet vent also protects the drain’s trap for several fixtures, all connected to one system. For those that don’t already know, every fixture in your bathroom needs to be vented.

What is the difference between a wet vent and a dry vent?

A dry vent supplies only air to the drain line, whereas a wet vent functions as both a drain line and a vent.