2026 NEW Milwaukee M18 Switch Tank 4 Gallon Backpack Sprayer – 2820-20PS

The Milwaukee M18 SWITCH TANK 4 Gallon backpack sprayer has an interchangeable tank design with no manual pumping. It delivers instant, constant, adjustable pressure for landscape maintenance applications. The sprayer consists of an M18 SWITCH TANK powered base and a 4 Gallon sprayer tank assembly. The powered base includes the motor, battery compartment, and REDLINK electronics, while the tank assembly includes the pump, hose, and wand.

Adjustable pressure: 20 120 PSI

• Spray distance: 25 ft
• Pressure adjustment: 5-mode knob
• Pump: Dual diaphragm
• Tank features: Wide mouth opening and debris strainer
• Backpack frame: Wide straps and transport/storage handle
• Compatible tank assemblies: 49-16-28CS and 49-16-28WS
• Battery: M18 REDLITHIUM XC3.0, sold separately
• Battery runtime: Up to 12 tanks of spraying per charge