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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

★★★★★

"Arrived in perfect condition, well protected. The color matched the listing exactly. It's handled my daily dog walks without issue. No complaints so far."

Carol Allen Carol Allen Jul 21, 2026
★★★★★

"Ordered the refurbished unit and the stitching has held up better than expected. Tested it through a full week of rain. I'm in Kansas City, MO. Happy with my purchase."

Linda Collins Linda Collins Jun 18, 2026
★★★★★

"Chose the king size and it fits true to size with no surprises. Used it for a week of meal prep. Couldn't ask for more at this price."

Melissa Gonzalez Melissa Gonzalez May 16, 2026
★★★★★

"Picked the blue one and the fabric is surprisingly breathable. Tested it through a full week of rain. I'm in Austin, TX. Glad I went with this one."

Ronald Cooper Ronald Cooper Jun 20, 2026
★★★★★

"Chose the stainless version and the fabric is surprisingly breathable. It's been my go-to for morning coffee runs. I'm in Boston, MA. Couldn't ask for more at this price."

Victor Reyes Victor Reyes Jun 12, 2026
★★★★★

"Bought the starter kit and the weight feels balanced and premium. It lives in my gym bag now. The strap is a little long for me, easy enough to adjust. Customer service was helpful when I had a question."

Sandra Peterson Sandra Peterson Jun 25, 2026
★★★★★

"Picked the blue one and the stitching has held up better than expected. Took it on a road trip last weekend. Happy with my purchase."

Rebecca Stewart Rebecca Stewart Jul 5, 2026
★★★★☆

"Chose the king size and the cushioning is supportive after hours. It's handled my daily dog walks without issue. I'm in Oklahoma City, OK. Happy with my purchase."

Joseph Bailey Joseph Bailey May 13, 2026
★★★★★

"Ordered the limited edition and it does exactly what it's supposed to do. Used it at the desk for video calls all month. Button is a bit stiff at first but loosens up with use. Five stars from me."

Brenda Turner Brenda Turner Aug 2, 2026
★★★★★

"Went with the wide fit and it fits true to size with no surprises. Brought it to a tailgate and it performed. Definitely a repeat customer after this."

Andrew Murphy Andrew Murphy May 8, 2026

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