It’s the vertical pipe that runs from your plumbing system up through your roof. It doesn’t carry water—it carries air . Its job is to equalize pressure so water can flow freely down your drains and to vent sewer gases safely outside.
Before you call an expensive plumber or tear apart your pipes, check your . clogged drain vent
You’ve tried the plunger. You’ve used the snake. You’ve even poured boiling water down the drain. But the water still drains slowly, gurgles, or smells bad. It’s the vertical pipe that runs from your
Don’t ignore a clogged vent—it can lead to slow drains, sewer gas exposure, and even a vacuum that empties your toilet traps. Bottom line: No air, no drain. Check the vent before you dig into the pipes. sewer gas exposure