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PACKOUT Modular Storage System
3019-21WS

M18 4-Gallon Water Supply Kit w/ SWITCH TANK™

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A red and white Milwaukee M18™ SWITCH TANK™ 4-Gallon Backpack Water Supply, featuring a coiled hose and blue handle on top. The brand logo is displayed on the front.
3019-21WSM18 4-Gallon Water Supply Kit w/ SWITCH TANK™

In The Box (5)

(1)
M18 4-Gallon Water Supply Kit w/ SWITCH TANK™
(1)
4-Gallon Water Supply Tank Assembly w/ SWITCH TANK™
(1)
M18™ REDLITHIUM™ XC Extended Capacity Battery
(1)
M18™ & M12™ Multi-Voltage Charger
(1)
Water Supply 10' Hose Assembly

Specs

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Product Overview

Our M18™4-Gallon Water Supply Kit w/ SWITCH TANK™ offers an easy-to-use interchangeable tank design with no manual pumping. Designed to meet your water supply needs for concrete cutting and coring, the battery-powered water supply delivers instant, constant, and adjustable pressure up to 60 PSI. The 5-mode pressure regulator adjustment knob adjusts the pressure between 20 – 60 PSI for ultimate control. The M18™ REDLITHIUM™ XC4.0 Battery (included) provides you with up to 40 tanks of water delivery per charge. The 4-gallon water supply tank features a dual diaphragm pump for increased durability and longer pump life. The tank also has a wide mouth opening for easier pouring and a strainer that filters debris from getting into the tank. The backpack frame includes a premium adjustable harness and a handle, providing convenient transportation and storage. The 4-Gallon Water Supply is made up of two components – the M18™ Powered Base w/ SWITCH TANK™ and the 4-Gallon Water Supply Tank Assembly w/ SWITCH TANK™ (49-16-19WS). The Powered Base includes the motor, battery compartment, and REDLINK™ electronics, while the interchangeable Tank Assembly includes the pump, 10ft hose, and quick-connect coupler. The isolated pump, hose, and tank allows you to add on tank additional tank assemblies for different applications. The M18 Powered Base is compatible with the 4-Gallon Sprayer Tank Assembly w/ SWITCH TANK™ (49-16-19PS). The M18™ 4-Gallon Water Supply Kit w/ SWITCH TANK™ is part of the M18™ system, which is fully compatible with over 300+ tools.

  • Interchangeable Tanks, No Manual Pumping

  • Instant, Constant and Adjustable Pressure for Ultimate Control

  • Run-time: Up to 40 tanks per charge with M18™ REDLITHIUM™ XC4.0 Battery

  • Adjustable Premium Harness and handle for convenient transport and storage

  • Add-On, Replace and Interchange Water Supply Tanks w/ SWITCH TANK™

  • OSHA Table 1 Compliant when Concrete Cutting and Coring

  • Up to 60 PSI

  • Wide Mouth Opening for Easier Pouring

  • Strainer to Filter Debris

  • Compatible with Pesticide Sprayer Tank Assemblies w/ SWITCH TANK™

Product Documents

Manual / Parts List

Reviews

Product FAQ

Q:

Is There A Tank Agitator For Mixing Chemicals And Water?​

A:

The M18™ 4-Gallon Backpack Sprayer w/ SWITCH TANK™ does not have an in-tank agitator

Q:

Are The Water Supply Accessories Compatible With The M18™ 4-Gallon Backpack Sprayer w/ SWITCH TANK™? ​

A:

No, water supply accessories are not compatible with pesticide sprayer tanks. Additionally, pesticide sprayer accessories are not compatible with water supply tanks.​

Q:

What Is The Difference Between The Backpack Sprayer And The Water Supply?​

A:

The M18™ 4-Gallon Backpack Sprayer w/ SWITCH TANK is designed for a variety of spraying applications with a feature set optimized for the precise application of chemical. The M18™ 4-Gallon Water Supply w/ SWITCH TANK is designed to be operated with clean water only. It’s most commonly used with concrete coring drills and cut-off saws to suppress silica dust and help users maintain OSHA Table 1 compliance in concrete coring and cutting applications. The Water Supply Kit also includes a quick-connect water nozzle that can be attached to the hose to facilitate easier water spraying. Each tank assembly is equipped with a different pump that is designed to deliver the optimal ranges of pressure/flow rate for their respective applications..​ ​ ​

Q:

What Is The Part Number For The Interchangeable Tank?​

A:

The part number for the M18™ 4-Gallon Sprayer Tank Assembly w/ SWITCH TANK™ is 49-16-19PS.​

Q:

What sprayer accessories are also compatible with the M12 1 & 2-Gallon Sprayers?​

A:

Sprayer Nozzles (49-16-2806)​ and 18” Short Sprayer Wand (49-16-2729)​. ​

Q:

How do I clean/maintain my sprayer and how often should I clean it?​

A:

Refer to the manual or the SWITCH TANK Cleaning Guide 2025 for instructions on cleaning and maintaining your M18™ 4-Gallon Backpack Sprayer w/ SWITCH TANK. It’s recommended that the sprayer is cleaned before storing and switching chemicals. Ensure the filter is clean and installed before each use for optimal performance.​

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