The plumbing vent, also known as a vent stack, helps regulate the air pressure in your plumbing system. 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. It also allows fresh air into the plumbing system to help water flow smoothly through the drain pipes.

However, no water runs through the plumbing vent pipe. It is a vertical pipe attached to a drain line and runs through the roof of your home. The vent stack is the pipe leading to the main roof vent. It channels the exhaust gases to the vent and helps maintain proper atmospheric pressure in the waste system.

When plumbing air vents or vent stacks do not work properly, neither will your home’s plumbing drainage system. If you hear gurgling sounds coming from your drains, see standing water in your sink or bathtub, or notice a slow drain in the bathroom or kitchen, a blocked vent may be the issue.

When a plumbing vent pipe or vent stack is blocked, negative pressure builds up in drainage pipes and water flow is interrupted. Though you may have success clearing a clogged drain yourself, stoppages will continue to occur if a blocked vent is the culprit.

Ongoing stoppages and slow-flowing drains can lead to sediment forming inside the drain pipes. This can further damage your plumbing system and may result in hefty pipe repair or replacement costs down the road.

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