Free Gift Card Details
$100 Order
$250 Order
$500 Order
$1000 Order
- The promotion will be automatically applied on the Shopping Cart page.
- To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
- Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
- E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
- Free e-gift cards expire 11/01/26.
- Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
- Valid online and in participating retail stores.
- Limited-time offer. Subject to change without notice.
Milwaukee M18 Switch Tank 4-Gallon Backpack Sprayer Kit, Tool, Battery and Accessories, Model# 2820-21PS

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Click or Tap image to Zoom
This item is no longer available.
- Powered base, and SWITCH TANK™ Assembly plus a REDLITHIUM™ XC Extended Capacity 18V battery and M18™/M12™ multi-volt battery charger
- Powered base includes motor, battery compartment and electronics
- Interchangeable tank assembly isolates the pump, hose and wand, separating wearable components from the M18™ SWITCH TANK™ powered base
- Switchable tanks eliminate cross-chemical contamination
- No manual pumping required -- powerful pump and motor deliver instant and constant pressure up to 120 PSI for ultimate control
See full description
Description
Key Specs
Reviews
Q & A
Warranty
Compare
Product Summary
What's Included
- (1) M18™ SWITCH TANK™ Powered Base (2820-20) (1) SWITCH TANK™ 4-Gallon Sprayer Tank Assembly (49-16-28PS) (1) M18™ REDLITHIUM™ XC Extended Capacity Battery (48-11-1828) (1) M18™ & M12™ Multi-Voltage Charger (48-59-1812)
Downloads

Features + Benefits
- Powered base, and SWITCH TANK™ Assembly plus a REDLITHIUM™ XC Extended Capacity 18V battery and M18™/M12™ multi-volt battery charger
- Powered base includes motor, battery compartment and electronics
- Interchangeable tank assembly isolates the pump, hose and wand, separating wearable components from the M18™ SWITCH TANK™ powered base
- Switchable tanks eliminate cross-chemical contamination
- No manual pumping required -- powerful pump and motor deliver instant and constant pressure up to 120 PSI for ultimate control
- 5-mode pressure adjustment knob adjusts pressure from 20-120 PSI
- 25ft. maximum spray distance
- Wide mouth tank opening and strainer/filter offer easier, debris-free filling of the tank
- Wide backpack straps on the frame provide comfort during extended duty cycles
- Transport handle for convenient transport and storage
- Dual diaphragm pump delivers longer pump life and Viton® seals for increased durability against harsh chemicals
- Sprays up to 50 gallons per charge
- Powered Base is compatible with the SWITCH TANK™ 4-Gallon Concrete Sprayer (Item# 79534) and 4-Gallon Water Supply (Item# 79536) Tank Assemblies (both sold separately)
Key Specs
| Attribute | Specification |
|---|---|
item# | 79535 |
Brand | Milwaukee |
Manufacturer's Warranty | 3 year limited warranty |
Ship Weight | 26.2 LB |
Tank Size | 4 Gal |
Flow | 120 GPM |
Pressure | 120 PSI |
Seal Type | Viton |
| Attribute | Specification |
|---|---|
Spray Height | 25 ft |
Spray Pattern | Adjustable |
Wand Length | 18 in |
Pump Type | Double Diaphragm |
Hose Length | 48 in |
Product Weight | lb |
Dimensions L x W x H (in.) | 10.0 x 13.0 x 21.75 in |
Reviews
Questions & Answers
Questions
Warranty
Manufacturer's Warranty
3 year limited warranty
Compare with Most Popular in Backpack Sprayers
See All Backpack Sprayers
See All Milwaukee Backpack Sprayers
Currently Viewing This Product
Item # 79535
Shipping: Sold Out
- $79.99
Shipping:
Factory shippedStore Pickup:
Not available - online only
- $149.99
Shipping:
Available now
$19.99 Same DayStore Pickup:
2 in stock at Fredericksburg VA - Pickup in under 1 hr
Item # 110290
$299.00Shipping:
Available now
$19.99 Same DayStore Pickup:
2 in stock at Fredericksburg VA - Pickup in under 1 hr
Specifications
4 Gal
4 Gal
4.75 Gal
4 Gal
120 GPM
0.5 GPM
-
0.6 GPM
120 PSI
60 PSI
40 PSI
90 PSI
Viton
Nitrile
-
Viton
25 ft
25 ft
-
35 ft
Adjustable
Adjustable
-
Adjustable
18 in
20 in
-
21 in
Double Diaphragm
Piston
-
Diaphragm
48 in
48 in
-
50 in
lb
10.5000 lb
11.2 lb
15.5000 lb
10.0 x 13.0 x 21.75 in
14.0 x 8.5 x 22.0 in
-
15.18 x 9.75 x 22.12 in
-
23 ft
-
-
-
-
-
Various
-
-
-
1 hr



