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Milwaukee 2820-20PS Pesticide Sprayer SWITCH TANK M18 4Gal Backpack ToolOnly

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Milwaukee 2820-20PS Pesticide Sprayer SWITCH TANK M18 4Gal Backpack ToolOnly is rated 2.6 out of 5 by 29.
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Our M18 SWITCH TANK 4-Gallon Backpack Sprayer delivers the industry's first interchangeable tank design with no manual pumping. Designed to meet the needs of professional landscape maintenance, the battery-powered backpack sprayer provides you with instant, constant and adjustable pressure up to 120 PSI and a 25 ft spray distance. The 5-mode pressure adjustment knob adjusts the pressure between 20 — 120 PSI, giving you the capability to complete a wide range of applications. Our M18 REDLITHIUM XC3.0 Battery (sold seperately) provides you with up to 12 tanks of spraying per charge. The 4-Gallon Sprayer Tank Assembly features a dual diaphragm pump for longer pump life and Viton seals for increased durability against harsh chemicals. The sprayer tank 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 giving you added comfort during extended spraying applications and a handle for convenient transport and storage. The 4-Gallon Sprayer is made up of two components — the M18 SWITCH TANK Powered Base and the SWITCH TANK 4-Gallon Sprayer Tank Assembly. The Powered Base includes the motor, battery compartment, and REDLINK electronics, while the interchangeable Tank Assembly includes the pump, hose, and wand. The isolated pump, hose, and wand design allows you to add on tank assemblies for different spraying applications, eliminating cross-chemical contamination. It also provides you with the ability to replace the tank assembly at a lower cost of ownership compared to replacing the entire sprayer. The Powered Base is also compatible with the SWITCH TANK 4-Gallon Concrete Sprayer (49-16-28CS) and 4-Gallon Water Supply (49-16-28WS) Tank Assemblies. Our M18 SWITCH TANK 4-Gallon Backpack Sprayer is part of the M18 system which is fully compatible with over 175 tools.

  • Interchangeable Tanks, No Manual Pumping
  • Add-on and Interchange Tank Assembly to Eliminate Cross-Chemical Contamination
  • Replaceable Tank Assembly Delivers Lower Cost of Ownership
  • Instant, Constant and Adjustable Pressure for Ultimate Control
  • Up to 120 PSI & 25' Spray Distance
  • Run-time: Up to 12 tanks per charge with M18 REDLITHIUM XC3.0 Battery
  • Critical seals: Viton for increased durability against chemicals
  • Dual Diaphragm Pump: For Longer Pump Life
  • Length (in): 10
  • Rec. Safety Equipment: Safety Glasses, Gloves
  • Height (in): 21.75
  • Global Trade Number (GTIN): 00045242526949
  • Start Type: Electric
  • Max. Horizontal Spray (ft): 25
  • Fuel Type: Battery Powered
  • Color / Finish: Red, Black, White, Green
  • Max. Vertical Spray (ft): 25
  • Decibel Rating (dB): 74.1
  • UPC: 045242526949
  • Fuel Tank Capacity (gal): 0
  • Dispenser Tank Size (gal): 4
  • Product Name: M18™ SWITCH TANK™ 4 Gallon Backpack Sprayer (Tool Only)
  • Cordless / Corded: Cordless
  • Battery Quantity Required: 1
  • Product Type: Pesticide Sprayer
  • Width (in): 13
  • Power Source: Battery
  • Voltage: 18 V
  • Number Of Batteries: 0
  • Battery Included: No
  • Manufacturer Warranty: 3 Years
  • Manufacturer Warranty: 3 Years
  • 1x Milwaukee 49-16-28PS SWITCH TANK 4-Gallon Sprayer Tank Assembly
  • 1x Angled Nozzle Adaptor
  • 1x Milwaukee 2820-20 M18 SWITCH TANK Powered Base
  • 1x Adjustable Nozzle
  • 1x Stainless Steel Wand
  • 1x Fan Nozzle


This product may or may not cause Cancer and Reproductive Harm. www.P65Warnings.ca.gov

Rated 1 out of 5 by from Really like the sprayer until it gets low Fast sprayer that is compatible with all my m18 batteries. Really enjoy using until it gets low. Most other reviews say it works until the last 1/2 gallon, from what I see that estimate is about right. Email support to see if there was any pointers to correct this... never heard back. To me, the flaw is where the pickup strainer is located. Leaning back helps but it's very uncomfortable to use this way. I'm slightly under 6' and tend to lean due to length of the sprayer wand. Think most users are doing the same as they use this.
Date published: 2020-08-06
Rated 5 out of 5 by from Awesome Product The SWITCH TANK sprayer has been the answer to my spraying problems. With this product I no longer need to manually pump to get to and maintain an optimal pressure – I just pop in a battery and I am ready to go. Not having to manually pump and getting a consistent flow rate has really increased my productivity throughout the day. One of the best features of this product is the interchangeable tank design. With this design I was able to get the base unit and add on an additional sprayer tank. So I have one tank for Roundup and another tank for fertilizer and I don’t need to worry about any cross chemical contamination. Keep up the great work Milwaukee!
Date published: 2019-10-10
Rated 1 out of 5 by from Still frustrated We are still having problems with our switch tanks. Another has been replaced under warranty. They ALL lose consistent pressure at between 1/2-1 gallon of product left in the tank. It doesn't matter whether the applicator is stationary or walking. Pressure is lost, then builds, then lost. The motor\pump is running the entire time but will not maintain a constant pressure. I have disassembled several of them to make sure there are no restrictions in the line anywhere. Also, one of them has leaked approximately 2.5 gallons of product through the wand in about 5 days. Power is off and the wand is closed, but it is still leaking. This is not the normal quality I have come to expect from Milwaukee. I have numerous other M18 power tools and have not had problems with them, other than wearing out from use. I don't know if these were rushed into production without proper testing, but at this point I believe I will be asking for my money back.
Date published: 2019-09-11
Rated 1 out of 5 by from Junk from the box I own several Milwaukee tools and have had no issues. Ignoring the horrible reviews I decided to purchase this sprayer. Proceeded to fill tank and noticed it was leaking. Base of tank is pouring out liquid and sprayer would not even work had to call Milwaukee to send to nearest repair facility
Date published: 2021-05-19
Rated 4 out of 5 by from I would buy this product again however... I think this is a great product. I like both that I don't have to do all the pumping and that it is powerful enough to do a wide spread or a long distance focused shot. But I just don't like that I can not disconnect the hose from the side of the take. Filling, storing and transporting the whole tank and hose together is awkward. However, it is still another excellent addition to my arsenal of tools!
Date published: 2019-07-15
Rated 1 out of 5 by from Leaked During First Use Recently bought this product from a factory authorized vendor listed on this website. Although the spray distance was in fact as advertised, which is why I purchased this, I ended up with pesticide all down my back from the leaking tank during the fist use. The leak is occurring at the fused area of the plastic on the very bottom of the tank. After reading the reviews, it appears that numerous others are experiencing similar issues. I am a huge Milwaukee tool fan in general, so this quality issue is upsetting. If they can fix the quality issues, this product would/will be outstanding. Respectfully, Dean
Date published: 2021-06-07
Rated 1 out of 5 by from Fatal Flaw - Avoid This Product I purchased two of these each with their own tank and both tanks leaked on the first use. One tank leaks enough to lose 20% of the contents before I can spray and the other leaks about 5%. I too, like many others, bought notwithstanding the reviews (many reviews) describing the issue because I love the other tools and have the battery system already. Now need to deal with warranty and customer service to get this corrected - is that even possible? I have other sprayers that don't have the switch tank capability, but don't leak so I should have just stayed with the other brad. Disappointed.
Date published: 2021-09-23
Rated 1 out of 5 by from Good idea , poor quality and tank assembly. I want to like this Unit but after trying 3 of them they all leake either right away or after 1 use. Thr tanks leak out of the bottom at the pump assembly. Tried 3 of them and all the same. From leaking out fast to a slow drip.
Date published: 2021-12-06
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