Abstract: The present invention discloses a method for self-cleaning filters without having to open the filter housing. Wash nozzles are integrated with the filter housings such that when the filters are clogged, both back-wash and regular washing can be performed with practically no down time. Moreover, without opening the filter housing, the hazardous components of the fluid to be filtered can be contained and dealt with before they escape the filter housing, thereby significantly reduces the environmental impact and harm to the working crew.

Abstract: A portable ultrasonic descaling device provides an improved method to remove calcium deposits and stains from the surfaces of swimming pools and other structures in contact with water. The handheld device comprises a water-resistant housing, within which are mounted an ultrasonic transducer, a fluid pumping system, a cleaning blade, a controller, and a power source. The ultrasonic transducer drives both the pumping system and the cleaning blade. The fluid pumping system draws fluids from a water source and through the device, cooling the transducer, cleaning blade, and surfaces being descaled by fore mounted spray nozzles. The power source comprises batteries to power the device. Lighting may also be fore-mounted for illumination and is connected to the circuitry along with a visual indicator. Direct contact of the calcified buildup with the oscillating cleaning blade and water spray from the nozzle heads causes breakdown of the deposits by cavitation.