The WATER SABER PRO eliminates the need to take most Air Conditioners apart to backwash the coil. It simply slides through the openings in the top or bottom of the Air Conditioner. The Debris Screen prevents spray nozzle clogging and the high quality water flow control valve with a swivel adapter, allows you to rotate and aim the jet-spray independent of the garden hose. No fighting to turn the whole hose! The 90 degree Spray Nozzle directs the jet spray through the coil, flushing all the contaminants out. It's made to last, with a Lifetime Warranty! "Backwashing" is the right way to clean A/C Coils, opposite their normal airflow. This is the only proven way to see that all of the dirt is removed from the coil.