What type of system is a wet vent specifically designed for?

A wet vent is specifically designed for commonly vented drainage systems. This type of system allows certain drain lines to serve both as waste pipes and as venting for the plumbing system, which can help minimize the number of pipes needed in a residential installation. The unique design permits the flow of both wastewater and air, ensuring proper drainage while simultaneously preventing sewer gases from entering living spaces.

In a commonly vented drainage system, wet vents can provide the necessary air pressure balance to ensure that wastewater can flow freely without creating negative pressure that could disrupt drainage. This efficient use of venting contributes to smoother drainage and improved functionality of plumbing fixtures connected to the system, making it a crucial aspect of residential plumbing design.