Message to Our Customers

Model # 190425

Internet # 204630255

Store SKU # 643785

Solo 4 Gal. Piston Backpack Sprayer

This item has been discontinued.
The Home Depot no longer carries this specific product.

$84.97 / each



Model # 190425

Internet # 204630255

Store SKU # 643785

The Solo Piston-Pump Backpack Sprayer is built for Comfort, Convenience and Durability. Easily and effectively handles disinfectants, fertilizers, herbicides, pesticides and formulations for tree, shrub and plant protection. Easier operating shut-off valve features lock-on/off for reduced hand fatigue.

California residents: see  Proposition 65 information

  • 4 Gal. tank features a large opening and a fine-mesh filter
  • Padded shoulder straps with a waist belt help to minimize effort and strain
  • 4 nozzles include brass adjustable, fan spray, hollow cone and jet stream to meet all your spraying needs
  • Large carry handle for easy on/off and storage


Hose length (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Length (in.) 
Product Width (in.) 
Adjustable spray tip 
Applicator type 
Capacity (gallons) 
Shoulder strap 
Sprayer Use 
Lawn and Garden 
Sprayer/mister type 
Tank Material 
HDPE(High Density Polethylene) 


Rated 3.9 out of 5 by 8 reviewers.
Rated 1.0 out of 5.0 by awful This is the third Solo backpack sprayer (of visibly similar design) that I have owned over the years; The others performed flawlessly for years. This one, first time out, clearly has a major problem that I didn't notice until I took it off my back once it was almost empty - the picture speaks a thousand words: there's obviously a major vacuum issue; and it does NOT bounce back to correct configuration once the top cover is removed. This will be returned! December 11, 2014
Rated 5.0 out of 5.0 by Great Product The Solo Backpack is one of the best. However you need to be very careful when purchasing. I have been purchasing these packs for many years from Home Depot and one thing that you have to check is that the box is not opened and re taped. About 90% of the time the ones that I have found not to be factory sealed have had issues. Now that being said Home Depot has been very good about exchanges, January 6, 2015
Rated 5.0 out of 5.0 by Great Product East to assemble and use, worked exactly as I had hoped and saved a lot of time! November 4, 2014
Rated 3.0 out of 5.0 by Weak Plastic... The sprayer works well and holds pressure. However, I have only owned it for a couple of months and the wand has already snapped. It was in my vehicle and something must have pressed up and snapped the wand, but this should not have happened so easily, but that is the problem with a cheap plastic wand October 14, 2014
Rated 4.0 out of 5.0 by strudy product its lightweight and does not drip, good spray good product August 16, 2014
Rated 4.0 out of 5.0 by Good Sprayer Very little assembly required. The only reason I didn't give it a 5 star rating is it doesn't spray the tank completely empty. It leaves about a cup in the tank and other sprayers I've owned completely drains the tank. No big deal just different, otherwise a very good sprayer. Worth the money. July 1, 2014
Rated 4.0 out of 5.0 by Works just like it says. Very good. It is an excellent product for the right price. Very well balanced, a little hard to get into harness, but works fine. June 17, 2014
Rated 5.0 out of 5.0 by we used it to apply linseed oil to our wood fence We used the product to apply linseed oil to our wood fence. It worked perfectly, and saved us a full day of work with a paint brush. June 3, 2014
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