The MILWAUKEE® M18™4-Gallon Water Supply Kit w/ SWITCH TANK™ offers an easy-to-use 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 regulator adjustment knob adjusts the pressure between 20 . 60 PSI for ultimate control. The M18™ REDLITHIUM™ XC3.0 Battery (included) provides you with up to 40 tanks of water delivery per charge. The 4-gallon water supply tank 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 a premium adjustable harness and a handle, providing convenient transportation and storage. The 4-Gallon Water Supply is made up of two components . the M18™ Powered Base w/ SWITCH TANK™ and the 4-Gallon Water Supply Tank Assembly w/ SWITCH TANK™ (49-16-19WS). The Powered Base includes the motor, battery compartment, and REDLINK™ electronics, while the interchangeable Tank Assembly includes the pump, 10ft hose, and quick-connect coupler. The isolated pump, hose, and tank allows you to add on additional tank assemblies for different applications. The M18 Powered Base is compatible with the 4-Gallon Sprayer Tank Assembly w/ SWITCH TANK™ (49-16-19PS). The M18™ 4-Gallon Water Supply Kit w/ SWITCH TANK™ is part of the M18™ system, which is fully compatible with over 275 tools. Features: Interchangeable Tanks, No Manual Pumping; Instant, Constant and Adjustable Pressure for Ultimate Control; Run-time: Up to 40 tanks per charge with M18™ REDLITHIUM™ XC3.0 Battery; Adjustable Premium Harness and handle for convenient transport and storage; Add-On, Replace and Interchange Water Supply Tanks w/ SWITCH TANK™; OSHA Table 1 Compliant when Concrete Cutting and Coring; Up to 60 PSI; Wide Mouth Opening for Easier Pouring; Strainer to Filter Debris; Compatible with Pesticide Sprayer Tank Assemblies w/ SWITCH TANK™