The MILWAUKEE® M18™ SWITCH TANK™ 4-gallon Water Supply Kit delivers an interchangeable tank design with no manual pumping. Designed to meet your concrete cutting and coring water supply needs, this battery-powered water supply provides instant, constant, and adjustable pressure of up to 60 PSI. The 5-mode pressure adjust dial allows you to adjust the pressure between 20 – 60 PSI for ultimate control. The M18™ REDLITHIUM™ XC3.0 battery (included) delivers up to 40 tanks of water delivery per charge. The 4-gallon water supply tank features a dual diaphragm pump for longer pump life and added durability. The tank also has a wide mouth opening for easier pouring and an onboard filter that prevents debris from entering the tank. The backpack frame includes an adjustable harness and a premium handle for easier transport and storage. The 4-gallon water supply consists of two components: the M18™ SWITCH TANK™ Powered Base and the SWITCH TANK™ 4-Gallon Water Supply Tank Assembly (49-16-19WS). The powered base includes the motor, battery compartment, and REDLINK™ electronics, while the interchangeable tank assembly includes the pump, 10 ft. hose, and quick-connect coupler. The isolated pump, hose, and tank allow you to add additional tank assemblies for different applications. The M18™ powered base is also compatible with the SWITCH TANK™ 4-Gallon Sprayer Tank Assembly (49-16-19PS). The M18™ SWITCH TANK™ 4-gallon Water Supply Kit is part of the M18™ System, which is fully compatible with over 275+ tools.