Scale Blaster DISH-1200 is their premium commercial model. This double coil unit is designed to work with dishwashers and other commercial appliances with up to 1-1/2" pipe. Designed to use complex modulating frequencies to destroy the calcium in your pipes. Scale Blaster's signal causes the ions precipitate or collide with each other to the point where the calcium crystals grow until they become so large that there are no more surface charges left to stick to the pipe walls or any other surface. For commercial dishwasher use only Powerful double output signal designed to help control scaling in the pipes and dishwasher equipment.