Step 4 · Flush with Garden Hose

This is the step most people slow down on. Take it one move at a time — there’s no rush, and you can rewind the clip as many times as you need.

For clogs deeper in the pipe, a garden hose can be effective. Have your helper on the ground connect a garden hose to a spigot and bring the other end up to you on the roof. Attach a spray nozzle set to a 'jet' or high-pressure stream. Insert the hose a few feet into the vent stack. Signal your helper to turn the water on at full pressure for 15-20 second bursts. The force of the water can often dislodge and flush down common clogs. Have a third person inside (or your helper) listen for the gurgling sounds to stop and for water to flow freely down the pipe.