The Scotsman AquaPatrol™ Single Water Filtration System (ADS-AP1) is easy to maintain and install. Cubers of up to 650 pounds and flakers and nugget dispensers of up to 1,200 pounds are all compatible with this system. The system leaves chlorine in the water in order to keep the machine cleaner for longer, saving you time and money. The Scotsman - ADS-AP1 - AquaPatrol™ Single Water Filtration System also features polyphosphate to help reduce scale buildup and extend the life of your equipment. This product is NSF certified.