Model # 190475

Internet #204630257

null Solo 4 gal. Diaphragm Backpack Sprayer

Solo 4 gal. Diaphragm Backpack Sprayer

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Product Overview

The Solo 4 gal. Diaphragm-Pump Backpack Sprayer is designed for use with powders, liquids and water-soluble solutions. The 4 nozzles offer stream adjustment for customizable spraying and the wand can be used for left and right handed application. Large 4.25 in. opening with strainer makes fill-up and clean-up fast and easy.

California residents: see   Proposition 65 information

  • 4 gal. tank features a large opening and a fine-mesh filter
  • Large carry handle for easy on/off and storage
  • Lock-on flow control for easy spraying
  • Heavy-duty padded shoulder straps with a waist belt



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/mister type

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Customer Questions & Answers

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Customer Reviews

Solo 4 gal. Diaphragm Backpack Sprayer is rated 4.0 out of 5 by 8.
Rated 5 out of 5 by from Best Backpack Sprayer!! Professional landscaper, Love the Solo brand because they do what they are supposed to right out of the box. They are the most comfortable and are easy to get parts and accesories since they are made here in the USA..
Date published: 2014-04-02
Rated 5 out of 5 by from excellent I took this home put it on and it fit like a glove. I was walking in the yard as if I had on added weight. Best purchase I ever made.
Date published: 2014-04-08
Rated 5 out of 5 by from Well made and easy to use So far this sprayer has worked very well for spraying week killer around the yard. The good ol 2 gal spray cans just don't hold enough to go around the yard and drive way seams most of the time so this 4 gal unit is just the ticket. Easy to pump up to usable pressure but needs to be refreshed often if pumping high volume through an opened up nozzle. I found the plastic nozzle presented a better range of spray patterns than the brass nozzle option in the bag of spare parts. Strap design could have been better as many others have stated. Overall, a very good investment for a good price from Home Depot.
Date published: 2014-08-13
Rated 4 out of 5 by from Worth the money First backpack sprayer I have ever owned. Love the diaphragm feature. You push the lever down with one hand, keeping the pressure up, while spraying with the other. The backpack straps are padded and the whole setup was comfortable enough to spray through 2 - 4gal tankfulls with no problem. I cannot speak to the durability as I have just had it one day, but am happy so far.
Date published: 2014-05-04
Rated 1 out of 5 by from Bad product Bought this thing in Spring, 2014. Used it multiple times, rinsing thoroughly with clean water each time. Dried it completely before storing it for the winter. Got it out this Spring (2015), filled it up, and it leaked like nobody's business. I asked for help from Solo. They sent me a rebuild kit that did not address the issue of a rusted bolt. Looks like they used a non-weather resistant bolt instead of a few more cents-worth stainless steel. No wonder it's discontinued. I will not buy another Solo product.
Date published: 2015-05-24
Rated 5 out of 5 by from Works very well enjoy it. IT was very easy to use put in on my back and was ready to work.
Date published: 2014-10-01
Rated 5 out of 5 by from Good sprayer. High quality. The sprayer is easy to use and clean. Very durable and high quality.
Date published: 2014-07-30
Rated 2 out of 5 by from Not Satisfied Quality control issues mainly. Straps should be lengthened as well.
Date published: 2014-08-20
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