Solo Backpack Sprayer 4gal With Piston Pump

4 gal high-density polyethylene tank with ultra-violet inhibitors allow for unmatched durability and ultra-violet protection. Large 4.25in opening for easy filling and cleaning. Shut-off valve and wand with an overall length of 28in for hard-to-reach places. Padded shoulder straps for greater comfort.

Piston Pump Sprayer - The industry standard. Chemically resistant Viton seals for long life and durability. The 425 is capable of producing a wide pressure range of up to 85 psi. Easily and effectively handles disinfectants, fertilizers, herbicides, pesticides, and formulations for tree, shrub and plant protection.

Related Categories: Backpack Sprayers

425
12.36 lbs
Out of Stock,
Please call for availability
QtyPrice
1–2

$94.99

3 +

$89.99



Specs

  • Four gallon tank
  • Fill neck opening 4.5in.
  • Piston pump
  • 85psi working pressure
  • Weight 12lbs.
  • Tank made of corrosion-resistant plastic
  • No metal or rubber parts are exposed to chemicals
  • Handle can be switched from left to right side
  • Includes fan, hollow cone, jet stream, and plastic adjustable tips.

    Product Features

    Sprayer has wide mouth for easy filling.
  • Warranty

    1 year warranty. Solo manufactured parts which fail due to defect in material or workmanship will be repaired or replaced without charge.

    Links

    Troubleshooting tips
    Standard 425 & Deluxe 425 Owner's Manual With Parts List

    FAQ

    QUESTION: Can you spray wettable powders through a 425?
    ANSWER: No, WP's are too abrasive for a piston type sprayer. For wettable powders we recommend the Solo 475.
    QUESTION: Will the plastic material last?
    ANSWER: Only high density polyethylene is used. The material is chosen for high molecular weight, high impact strength, and excellent resistance to chemicals and stress. Ultraviolet inhibitors are used in the material to reduce deterioration caused by sunlight.
    QUESTION: Can I use weedkiller and insecticide in the same sprayer?
    ANSWER: In theory you can, if the sprayer is thoroughly cleaned out with an ammonia:water solution of 1:25. In practice, the use of both types of chemicals in the same unit is not recommended as the risk to plants can be high. Use caution when handling any type of chemical and when cleaning your sprayer.
    QUESTION: Does the unit require constant pumping?
    ANSWER: The well-designed lever action greatly reduces the pumping effort. The pressure cylinder within the tank has a hydraulic effect. Liquid from the pump compresses air in the pressure chamber which allows irregular pumping action, yet results in steady spray at the nozzle.
    QUESTION: Can you use bleach in this sprayer?
    ANSWER: No, the vendor says it ruins the o-rings.

    Review Summary (Based on 4 Reviews)

    Customer Reviews

    4 Stars Solo Backpack Sprayer Review

    Sean A. from NC wrote (November 20, 2011):

    I bought it to help me with big spraying jobs. The good thing about it is that you don't have to stop and pump a hand-held sprayer, you can just keep going. The thing I don't like about it is that it leaks on me right where the hose connects to the tank.

    5 Stars Solo back pack sprayer

    from KS wrote (November 18, 2011):

    I really like the sprayer as far as I can tell. I really won't use it until spring.

    5 Stars solo 425

    R. Nolder from PA wrote (August 07, 2011):

    21 years ago I bought this sprayer off of A.M. Leonard back in Aug 1990. I have used it spraying every year Round Up and Crossbow. The best sprayer I have owned.

    4 Stars solo piston back pack sprayer review

    Dick M. BS forestry Univ. of Illinois/Urbana-Champ. from OH wrote (March 15, 2011):

    Even with a few flaws it is the best I've used for the dollar spent. 1) When pumping the handle, any hardware I carry on my belt is sometimes in conflict with the handle. 2)When I received the newest unit (I have 4) the plastic piece holding the bottom of one of two straps was broken, but quickly replaced by AML. 3)As long as you triple rinse the piston with clean water it will last for years. 4)After several years of use it may be necessary to add hex nuts to the handle bolts and there is some difficulty with space to accomplish this. 5)I've run diesel, suspensions, WP's, and soluables through this sprayer. As long as you do a good clean up it will work.

    QUESTION: Can you spray wettable powders through a 425?
    ANSWER: No, WP's are too abrasive for a piston type sprayer. For wettable powders we recommend the Solo 475.
    QUESTION: Will the plastic material last?
    ANSWER: Only high density polyethylene is used. The material is chosen for high molecular weight, high impact strength, and excellent resistance to chemicals and stress. Ultraviolet inhibitors are used in the material to reduce deterioration caused by sunlight.
    QUESTION: Can I use weedkiller and insecticide in the same sprayer?
    ANSWER: In theory you can, if the sprayer is thoroughly cleaned out with an ammonia:water solution of 1:25. In practice, the use of both types of chemicals in the same unit is not recommended as the risk to plants can be high. Use caution when handling any type of chemical and when cleaning your sprayer.
    QUESTION: Does the unit require constant pumping?
    ANSWER: The well-designed lever action greatly reduces the pumping effort. The pressure cylinder within the tank has a hydraulic effect. Liquid from the pump compresses air in the pressure chamber which allows irregular pumping action, yet results in steady spray at the nozzle.
    QUESTION: Can you use bleach in this sprayer?
    ANSWER: No, the vendor says it ruins the o-rings.
    Solo Backpack Sprayer 4gal With Piston Pump