A low-cost 4-gallon kit for homeowners already on the Greenworks 24V battery.
Amazon $149.89
A powerful 4-gallon sprayer for Milwaukee M18 owners, especially pros spraying harsh chemicals.
- 4 galTank
- 140 PSISpray power
- 80 gal/chargeRuntime or airflow
- 18 V, sold separatelyPower source
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
- 140 PSI reaches high hedges and trees
- Switch Tank system lets the pump base take other tank types
- Dual diaphragm pump with Viton seals for harsh chemicals
- Hip belt and lumbar support
- Sold without battery or charger
- Tank warranty is only one year
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | 3019-20PS |
|---|---|
| Spraying | |
| Tank | 4 gal |
| Max pressure | 140 PSI |
| Max flow | 0.5 GPM |
| Power | |
| Battery | 18 V, sold separately |
| Gallons per charge | 80 gal |
| Tanks per charge | 20 |
| Features | |
| Adjustable pressure | Yes |
| Agitator | No |
| Gauge or control panel | No |
| Build | |
| Warranty | 3 years |
Alternatives in this type
A long-running 4-gallon Jacto with digital pressure control, for crews spraying low-pressure herbicide over long days.
Amazon $249.99The most powerful battery backpack sprayer here, for owners of EGO 56V tools who need reach into trees and tall hedges.
Amazon $296.10Compare
Compare the Milwaukee M18 Switch Tank with any other battery backpack sprayer →
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