The MILWAUKEE 2820-20PS – M18 SWITCH TANK 4-Gallon Backpack Sprayer is a professional-grade, battery-powered sprayer designed for landscape maintenance, pest control, and agricultural applications. It features an interchangeable tank system, allowing users to swap out tanks for different chemicals without cross-contamination. Powered by Milwaukee’s M18 REDLITHIUM™ battery system (battery sold separately), the sprayer delivers instant and consistent pressure up to 120 PSI, with a 5-mode pressure adjustment knob that lets users fine-tune output between 20 and 120 PSI. This flexibility supports a wide range of spraying tasks, from gentle misting to high-pressure applications, with a spray distance of up to 25 feet.
The sprayer includes a dual diaphragm pump for extended life and Viton® seals that resist harsh chemicals, making it durable and low-maintenance. Its wide mouth opening and built-in strainer simplify filling and reduce clogging, while the ergonomic backpack frame with padded straps ensures comfort during long spraying sessions. The system is composed of two parts: the M18 SWITCH TANK Powered Base, which houses the motor and electronics, and the 4-Gallon Sprayer Tank Assembly, which includes the pump, hose, and wand. This modular design not only reduces long-term costs by allowing tank-only replacements but also expands compatibility with other SWITCH TANK assemblies like concrete sprayers and water supply tanks.
