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.

Brand: Solo Inc


Related Categories: Backpack Sprayers

425
12.36 lbs

In Stock
QtyPrice
1–2

$97.99

3 +

$94.99


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 6 Reviews)

    Customer Reviews

    5 Stars 425 Solo

    Bob from PA wrote (June 04, 2012):

    I purchase this sprayer fom A.M-Leonard on 08/06/1990 and have used it a couple times a year, every year. It's starting to leak a little so time to order seals. 22 years and still can get parts and they make the unit. Nice.

    1 Star this sprayer stinks

    from wrote (April 23, 2012):

    Lever on piston broke right after warranty was up.

    A.M. Leonard: The customer was contacted and send a new part for the sprayer.

    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.

    Read All 6 Reviews...