2/17/2025

Milwaukee® M18™ 4-Gallon Backpack Sprayer w/ SWITCH TANK™: Unmatched Pressure Control and Versatility

MILWAUKEE, WI  – Continuing their commitment to relentless innovation, Milwaukee Tool introduces  the M18™ 4-Gallon Backpack Sprayer w/ SWITCH TANK™, designed to meet the needs of professional landscape maintenance. This innovative backpack sprayer delivers the industry’s best pressure control and eliminates the need for manual pumping while featuring an interchangeable tank design, ensuring effortless operation and versatility.

The M18™ Backpack Sprayer sets a new standard for pressure control, offering instant, constant, and adjustable pressure up to 140 PSI and a 24ft spray distance. The battery-powered design provides users with a hassle-free experience, allowing for continuous spraying without the physical strain associated with traditional manual sprayers. Additionally, the 5-mode flow rate knob adjusts the flow from 0.1 to 0.52 GPM, giving users the capability to complete a wide range of applications with precision. This innovation enables landscape maintenance professionals to focus on their tasks without interruption, significantly improving workflow and efficiency.

Significantly enhancing the user experience with elimination of manual pumping, Milwaukee’s new sprayer with battery-powered design allows for continuous spraying.  With the included M18™ REDLITHIUM™ XC3.0 Battery, users are provided with up to 20 tanks of spraying per charge on mode 3. This ensures professionals can work longer and more efficiently while reducing the pain points   of fatigue and repetitive motion injuries caused by manual pumping.  

Integrated with an interchangeable tank design, that features an isolated pump, hose and wand, users are provided with a practical solution to have a single powered base that works with multiple accessory tanks to address the concern of cross chemical contamination. The 4-Gallon Sprayer Tank Assembly features a dual diaphragm pump for longer pump life and Viton® seals for increased durability against harsh chemicals. Its optimized design ensures better weight distribution, while the wide mouth opening allows for easier pouring. Further enhancing ease and versatility, the M18™ 4-Gallon Backpack Sprayer’s backpack frame is designed for comfort, featuring padded straps, lumbar support, and a hip belt, making it ideal for extended spraying applications.  The sprayer consists of two components: the M18™ Powered Base, which houses the motor, battery compartment, and REDLINK™ electronics, and the interchangeable Tank Assembly that includes the pump, hose, and wand. This isolated design allows users to easily switch between tank assemblies for different spraying applications, effectively eliminating cross-chemical contamination. 

The M18™ Powered Base is compatible with the 4-Gallon Water Supply Tank Assembly w/ SWITCH TANK™, specifically designed for concrete cutting and coring. 
Milwaukee is committed to improving productivity by providing performance-driven and trade-focused solutions so users can perform an entire day's work on one battery system. TheM18™ 4-Gallon Backpack Sprayer w/ SWITCH TANK™ is fully compatible with the entire M18™ line, now offering more than 275 solutions. 

Specifications:
M18™ 4-Gallon Backpack Sprayer w/ SWITCH TANK™ Kit (3019-21PS)- $499
   • High Visibility Tank Markings
   • Tank Identification Stickers
   • Height: 22.5” 
   • Weight: 18.9 lbs 
   • 3-Year Warranty for Base
   • 1-Year Warranty for Tank

Kit Includes: (1) M18 Powered Base w/ SWITCH TANK; (1) 4-Gallon Sprayer Tank Assembly w/ SWITCH TANK; (1) M18™ REDLITHIUM™ XC3.0 Battery; (1) M18™ & M12™ Multi-Voltage Charger; (1) Stainless Steel Wand; (1) Adjustable Nozzle; (1) Fan Nozzle; (1) Angled Nozzle Adapter

Available as Bare Tool: M18™ 4-Gallon Backpack Sprayer w/ SWITCH TANK™ Tool Only (3019-20PS)- $399   

Additional Tank Assembly: 4-Gallon Sprayer Tank Assembly w/ SWITCH TANK™ (49-16-19PS)- $199

Also Available: M18™ 4-Gallon Water Supply Kit w/ SWITCH TANK™ (3019-21WS)- $499

About Milwaukee Tool
Milwaukee Tool, founded in 1924, is a global leader in delivering innovative solutions to the professional construction trades that increase productivity and safety. Milwaukee® is known for their world-leading M12™, M18™, and MX FUEL™; cordless tool systems, the ground-breaking performance of their cordless innovations, safety solutions, battery-powered outdoor power equipment, jobsite lighting and clean-up, time-saving tool accessories, and innovative hand tool and PACKOUT™; Modular Storage products. The company is dedicated to delivering a steady stream of advanced, trade-specific solutions.

Milwaukee Tool is a Brookfield, Wisconsin-based subsidiary of Techtronic Industries Co. Ltd. (TTI) (HKEx stock code: 669, ADR symbol: TTNDY). For more information on the full line of Milwaukee® products, please call 1-800-SAWDUST or www.milwaukeetool.com