When the vent is clogged, water flows like a straw with your finger on the top. It glugs. It hesitates. It stops. So, what clogs a pipe that never actually touches water? A surprising amount of organic warfare.
Snakes (augers) are for drains. Vents require velocity. A hydro-jet shoots water at 4,000 PSI through a hose. The spinning nozzle flies up the pipe like a rocket, blasting the calcified sludge off the walls. It doesn't just poke a hole; it restores the full 3-inch diameter. The Hard Truth: The Ice Pick is a Lie I see DIY forums recommend taping a garden hose to a PVC pipe and "poking" the clog. Don't do this. If you break the cast iron vent pipe from the inside (it is often rusted thin), you will have a hole in your wall that leaks sewer gas into your bedroom for months before you find it. drain vent clogged
But here is the nuance: You can't just clear the top. When the vent is clogged, water flows like
