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Milwaukee 2820-21WS M18 Switch Tank 4 Gallon Backpack Water Supply Kit

Original price was: $526.00.Current price is: $64.80.

SKU: SBLH96359 Category:
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Description

The Milwaukee M18 Switch Tank 4 Gal. backpack water supply kit is the industrys first interchangeable tank design with no manual pumping. Designed to meet 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 adjustment knob adjusts the pressure between 20 to 60 psi for ultimate control. The 4 Gal. water supply tank assembly has 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 wide straps and a handle for convenient transportation and storage. The 4 Gal. water supply is made up of two components the M18 Switch Tank powered base and the Switch Tank 4 Gal. water supply tank assembly. The powered base includes the motor battery compartment and Redlink electronics. The interchangeable tank assembly includes the pump 10 ft hose and quick-connect. The isolated pump hose and quick-connect design allows tank assemblies to be added for different applications eliminating cross-chemical contamination. It also allows tank assemblies to be replaced at a lower cost of ownership compared to replacing the entire water supply. The powered base is also compatible with the Switch Tank 4 Gal. concrete sprayer 49-16-28CS and 4 Gal. sprayer 49-16-28PS tank assemblies. The M18 Switch Tank 4 Gal. backpack water supply is part of the M18 system which is fully compatible with over 175 tools. The kit also includes one M18 Redlithium XC3.0 battery and an M18/M12 multi-voltage charger.

  • Instant, Constant and Adjustable Pressure for Ultimate Control
  • Up to 60 PSI
  • Run-time: Up to 12 tanks per charge with M18 REDLITHIUM XC3.0 Battery
  • OSHA Table 1 Compliant when Concrete Cutting and Coring – Wide Mouth Opening for Easier Pouring
  • Strainer to Filter Debris
  • Wide Straps and and handle for convenient transport and storage
  • Compatible with SWITCH TANK Concrete Sprayer and Pesticide Tank Assemblies

Reviews

★★★★★

"Went with the small and the weight feels balanced and premium. I use it in the garage most evenings. I'm in Seattle, WA. Would buy again."

Edward Patel Edward Patel May 8, 2026
★★★★★

"Got the white finish and the sound is clear without any static. Took it to the lake house for the weekend. I'm in Sacramento, CA. Solid deal, no regrets."

Samuel Peterson Samuel Peterson Jun 18, 2026
★★★★☆

"Got the charcoal one and the compartments keep everything organized. I've been using it daily for about two weeks now. Would buy again."

Betty Watson Betty Watson Aug 13, 2026
★★★★☆

"Got the 2-pack and the cushioning is supportive after hours. I keep it in the car for road trips. Took a minute to snap together, fits great now. No complaints so far."

Margaret Stewart Margaret Stewart Jul 5, 2026
★★★★★

"Got the white finish and the compartments keep everything organized. Used it at the desk for video calls all month. I'm in Seattle, WA. Happy with my purchase."

Elizabeth Young Elizabeth Young Jul 12, 2026
★★★★★

"Got the travel size and the weight feels balanced and premium. Used it at the desk for video calls all month. I'm in Milwaukee, WI. Solid deal, no regrets."

Gary Baker Gary Baker Jul 23, 2026
★★★★☆

"Picked the matte black and it does exactly what it's supposed to do. Brought it to a tailgate and it performed. No complaints so far."

Mark Hill Mark Hill Jun 2, 2026
★★★★★

"Chose the stainless version and the sound is clear without any static. Brought it to a tailgate and it performed. Five stars from me."

Betty Khan Betty Khan Aug 10, 2026
★★★★★

"Chose the larger size and the fabric is surprisingly breathable. I've been using it daily for about two weeks now. I'm in Oklahoma City, OK. No complaints so far."

Gary Turner Gary Turner Jul 5, 2026
★★★★★

"Ordered the limited edition and the material feels solid and well-made. Used it during a move and nothing shifted. One minor scuff on the corner, purely cosmetic. I'm in Sacramento, CA. Would buy again."

Jack Phillips Jack Phillips Aug 9, 2026

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