Our SWITCH TANK 15L Backpack Water Supply delivers the industry’s first interchangeable tank design with no manual pumping. Designed to meet your water supply needs for concrete cutting and coring, the battery-powered water supply delivers instant, constant and adjustable pressure up to 60 PSI. The 5-mode pressure adjustment knob adjusts the pressure between 20 – 60 PSI for ultimate control. Our M18 REDLITHIUM-ION 3.0Ah Battery (sold seperately) provides you with up to 12 tanks of water delivery per charge. The 15L Water Supply Tank Assembly features a dual diaphragm pump for increased durability and longer pump life. The tank also has a wide mouth opening for easier pouring and a strainer that filters debris from getting into the tank. The backpack frame includes wide straps and a handle for convenient transport and storage. The 15L Water Supply is made up of two components – the SWITCH TANK Powered Base and the SWITCH TANK 15L Water Supply Tank Assembly. The Powered Base includes the motor, battery compartment and REDLINK PLUS intelligence, while the interchangeable Tank Assembly includes the pump, 3m hose with quick-connect. The isolated pump and hose design allows you to add on tank assemblies for different applications, eliminating cross-chemical contamination. It also provides you with the ability to replace the tank assembly at a lower cost of ownership compared to replacing the entire sprayer. The Powered Base is also compatible with the SWITCH TANK 15L Concrete Sprayer (491628CS) and 15L Chemical Sprayer (491628WS) Tank Assemblies. Our SWITCH TANK 15L Backpack Sprayer is part of the M18 system which is fully compatible with over 175 tools.