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The Milwaukee M18 SWITCH TANK 4 Gal. Backpack Sprayer delivers the industry’s first interchangeable tank design with no manual pumping. Designed to meet the needs of professional landscape maintenance, the battery-powered backpack sprayer provides users with instant, constant and adjustable pressure up to 120 psi and a 25 ft. spray distance. The 5-mode pressure adjustment knob adjusts the pressure between 20 psi to 120 psi, providing users with the capability to complete a wide range of applications. The 4 Gal. Sprayer Tank Assembly features a dual diaphragm pump for longer pump life and Viton seals for increased durability against harsh chemicals. The sprayer tank 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 providing users with added comfort during extended spraying applications and a handle for convenient transport and storage. The Milwaukee M18 REDLITHIUM XC 5.0 Ah Battery Pack delivers up to 2.5X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries.


  • Instant, constant and adjustable pressure for ultimate control
  • Up to 120 psi and 25 ft. spray distance
  • Run-time: up to 12 tanks per charge with M18 REDLITHIUM XC3.0 battery
  • Critical seals: Viton for increased durability against chemicals
  • Dual diaphragm pump: for longer pump life
  • Wide mouth opening and strainer: for easier, debris free pouring
  • Wide straps for comfort during extended duty cycles
  • Transport handle for convenient transport and storage
  • Includes: M18 SWITCH TANK powered base, switch tank 4 Gal. sprayer tank assembly, stainless steel wand, adjustable nozzle, fan nozzle, angled nozzle adaptor and M18 XC 5.0 battery (48-11-1850)
  • RedLINK intelligence: provides optimized performance and overload protection using total system communication between tool, battery and charger
  • Best-in-class construction: offers long-lasting performance and durability


  • Brand: Milwaukee
  • Hose Length (In.): 48 in
  • Battery Amp Hours: 5 Ah
  • Capacity (Gallons): 4
  • Assembled Dimensions (HxWxDxL): 21.75 x 13 x 10 x 10 inches