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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

★★★★★

"Got the 2-pack and the material feels solid and well-made. I've been using it daily for about two weeks now. Would buy again."

Larry Johnson Larry Johnson May 19, 2026
★★★★☆

"Chose the stainless version and the stitching has held up better than expected. Brought it to a tailgate and it performed. I'm in Pittsburgh, PA. Pleasantly surprised."

Michelle Ali Michelle Ali Aug 13, 2026
★★★★★

"The team was responsive when I reached out. Cushioning is supportive after hours. I've been using it daily for about two weeks now. Slightly heavier than expected, still well balanced though. I'm in San Diego, CA. Glad I went with this one."

Travis Reed Travis Reed Aug 4, 2026
★★★★★

"Chose the larger size and the material feels solid and well-made. I've been using it daily for about two weeks now. No complaints so far."

Laura Reyes Laura Reyes Aug 11, 2026
★★★★★

"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 zipper glides without catching. Took it on a road trip last weekend. Five stars from me."

Evelyn Ali Evelyn Ali Aug 11, 2026
★★★★☆

"Picked the matte black and the screen is sharp and bright in daylight. Brought it to a tailgate and it performed. Customer service was helpful when I had a question."

Tyler Young Tyler Young May 4, 2026
★★★★★

"Went with the XL and the material feels solid and well-made. I've had it on the kitchen counter daily. One minor scuff on the corner, purely cosmetic. I'm in Denver, CO. No complaints so far."

Kathleen Ward Kathleen Ward Jun 17, 2026
★★★★★

"Picked the blue one and setup took me less than five minutes. Tested it through a full week of rain. Would buy again."

Naomi Peterson Naomi Peterson Jun 25, 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

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