The vent pipe runs vertically from your sewer line up through the roof of your house. Its primary job is to supply air to the plumbing system. When water rushes down a drain (like flushing a toilet), it creates a vacuum effect behind it. Without the vent pipe supplying air to fill that space, the water would flow sluggishly, or not at all—much like trying to pour milk quickly out of a jug without creating a second hole for air to enter.
: When a vent is blocked, negative pressure builds up, making multiple fixtures (showers, sinks, and tubs) drain sluggishly simultaneously. plumbing vent pipe clogged
Fixing a clogged vent pipe is rarely a job for a plunger. It often requires climbing onto the roof to clear debris manually or using a (snake) to break up deep-seated obstructions. In some cases, a high-pressure water hose can be used to flush the stack. The vent pipe runs vertically from your sewer
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