This NEW high-powered innovative pressurized filter cleaning system uses a multi-purpose flushing control at the top of the unit. Position 1 allows for normal filtration. Position 2 allows for manual backflush cleaning cycle. Unit can be buried up to the top to keep it out of sight. Comes with a 9 watt Bitron UV built in the lid. For ponds up to 800 gallons. Comes with a 15' cord and 3 year warranty.