Step 6 · Apply Water Pressure
Hold the garden hose firmly a foot or two back from the drain opening. Signal your helper to turn on the water spigot fully and quickly. If working alone, turn the water on and quickly return to the drain. You will feel the hose stiffen and pulse as the bladder inflates to seal the pipe. Once sealed, the bladder will release powerful jets of water against the clog. The hose may jerk or vibrate as it works. Allow the water to run for 1-2 minutes to give it time to break down and flush the clog. Be vigilant for any signs of water backing up in other drains or leaks in your plumbing system, and be prepared to shut the water off immediately if this occurs.