Steel Dragon Tools 95 High-Pressure Compressed Air Plunger Heavy-Duty Toilet Plunger for Drain Lines Quickly clear blockages in sinks, drains, and showers in the bathroom, kitchen, garage, and shop. Works in complex pipe systems with multiple bends that a drain cable can not reach. Pump up the air cylinder to the required pressure and pull the trigger. Eliminate messy cables. Maximum PSI: 145 (works best at 60-100 PSI)