The Milwaukee M18 Switch Tank Interchangeable Sprayer and Water Supply System starts with a power base and connects to tanks designed for water supply, pesticides, and concrete applications. It’s an intriguing concept powered by the M18 battery platform.
10-Second Summary
- M18 battery operated power base
- Three 4-gallon tanks available – water supply, pesticide, or concrete
- 2820-21WS – Water supply Switch Tank system: $439 ($164 tank only)
- 2820-21CS – Concrete sprayer: $439 ($164 tank only)
- 2820-21PS – Pesticide sprayer: $399 ($149 tank only, $299 power base and tank)
- XC 3.0 Ah battery will run up to 12 tanks on a charge
Milwaukee M18 Switch Tank Interchangeable Sprayer and Water Supply System
What’s interesting about this system is the two areas the system covers – concrete construction and landscaping. Both have legitimate uses and this is an interesting way to use one power base to expand in both industries.
The best part is that you’re looking at a battery-powered backpack sprayer. You can leave your days of manual pumping behind you.
This is a two-part system. The power base is where your battery connects and the motor lives. The tank assembly holds the pump, hose, accessories, and stores your liquid. It may seem odd to separate the motor and pump, but that’s what gives Milwaukee the ability to get different flow rates for different applications.
That kind of separation also means you can swap tanks without worrying about cross-contamination. As a mason, put different sealants in different tanks. As a landscaper, get a different tank for each pesticide and herbicide.
Each kit comes with a 3.0 Ah battery – enough for up to 12 tanks or 48 gallons of product.
Water Supply
For the construction side of things, the Milwaukee M18 Switch Tank Water Supply system is primarily targeting concrete cutting and drilling. It gives you adjustable pressure between 20 and 60 PSI with 5 adjustment settings.
The tank has a dual diaphragm pump and a wide mouth with a strainer.
- Milwaukee 2820-21WS
- 20 – 60 PSI with 5 adjustment settings
- 0.16 – 1.13 GPM flow rate
- Up to 12 tanks per charge with a 3.0 Ah battery
- Nitrile seals
- 10′ hose with quick connect
- Water spray nozzle included
- 18.45 pounds with battery, power base, and tank
- 3-year power base warranty
- 1-year tank assembly warranty
- $439 ($164 tank only 49-16-28WS)
Concrete Sprayer
This one is for Pros working in concrete with a similar build as the Pesticide sprayer. You get the same 20 – 120 PSI adjustable pressure with 5 settings and 25-foot spray distance. The entire tank gets Viton seals.
The major difference is the flow rate. You’ll get 0.14 – 0.82 gallons per minute of flow from the concrete system compared to 0.10 – 0.51 from the pesticide sprayer.
- Milwaukee 2820-21CS
- 20 – 120 PSI with 5 adjustment settings
- 0.14 – 0.82 GPM flow rate
- 25′ spray distance
- Up to 12 tanks per charge with a 3.0 Ah battery
- Vitron seals
- 4′ hose with sprayer handle and wand
- Lock off/on mechanism on sprayer handle
- Large diameter adjustable nozzle and fan nozzle included
- 18.3 pounds with battery, power base, and tank
- 3-year power base warranty
- 1-year tank assembly warranty
- $439 ($164 tank only 49-16-28CS)
Pesticide Sprayer
The Milwaukee M18 Switch Tank Pesticide Sprayer system has 5 adjustable pressure settings from 20 to 120 PSI with a maximum spray distance of 25 feet. The lower flow rate is designed to give you more control for targeting small areas.
The tank has the same dual diaphragm pump as the others along with Viton seals in critical areas and nitrile seals in others. It also features a wide opening with a strainer.
- Milwaukee 2820-21PS
- 20 – 120 PSI with 5 adjustment settings
- 0.10 – 0.51 GPM flow rate
- 25′ spray distance
- Up to 12 tanks per charge with a 3.0 Ah battery
- Vitron seals on critical areas, nitrile on others
- 4′ hose with sprayer handle and wand
- Lock off/on mechanism on sprayer handle
- Small diameter adjustable nozzle and fan nozzle included
- 18.3 pounds with battery, power base, and tank
- 3-year power base warranty
- 1-year tank assembly warranty
- $399 ($149 tank only 49-16-28PS or $299 bare tool 2820-20PS)
