Chapin 63924 4-Gallon 24v Rechargeable Backpack Sprayer


  • $174.99
    Unit price per 
Shipping calculated at checkout.

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  • Features a 24-volt Lithium Ion battery for up to 2 hours of continuous spraying
  • Sprays up to 58 gallons on a single charge
  • 4-gallon tank
  • 6" wide mouth funnel for easy filling and cleaning
  • 3-stage filtration system with in-tank removable filter to prevent clogging
  • Deluxe padded shoulder straps for hours of comfortable spraying
  • Offers 35-40 PSI with a 20-22-foot maximum horizontal spray stream and up to 32-foot vertical spray stream
  • Santoprene seals in the pump offer maximum chemical resistance. 


    • General Purpose Cleaning
    • Fertilizers
    • Weed & Feed
    • Fungicides
    • Herbicides
    • Pesticides



    Chapin Product Manual graphic - red book with Product Manual

    Chapin 63924 Product Manual


    Tips & Maintenance Videos

    Technical Specs

    Model Number 63924
    Tank Size 4-gallon
    Tank Mouth Opening 6-inches
    Tank Construction poly
    Pump Type 24-Volt battery electric
    Hose Length 48-inches
    Hose Material clear reinforced
    Shut-Off Material poly cushion-grip
    Shoulder strap yes
    Battery Type lithium ion
    Spray Hours 2
    Warranty 2-Year Limited
    Spray/Flow Rate (GPM) .4-.5 gpm
    Nozzle(s) adjustable brass cone, poly-fan, poly-cone
    Filters 3-stage
    Frame powder-coated steel
    Shipping Weight In Pounds 1.9
    Item Weight In Pounds 12
    Extension Wand Material poly
    PSI - Operating Pressure 35-40 psi
    Package Dim. In. (LxWxH)
    15.0 x 9.25 x 22.15
    Item Dim. In. (LxWxH)
    14.75 x 9.0 x 21.9
    Extension Wand Length
    Spray Hours
    Spray Stream Max Horiz.


    *Spray distance is dependent on many factors such as adjusted nozzle orifice size, tank pressure, wind interference and angle of inclination. Spray distances may vary based on user's specific application.

    Customer Reviews
    3.3 Based on 6 Reviews
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    Filter Reviews:
    mike r.
    United States United States
    Works great

    Great it works as it should. The back pack straps could be a little better but there ok

    Joseph L.
    United States United States
    Great sprayer

    I've owned this sprayer for 3 seasons. I use it to spray for mosquitoes every 2 weeks on my surburban lot in GA. It works perfectly for this application. I'm guessing the horizontal spray is approx. 30'; vertical is approx. 25'. I'm still using the original battery it came with and have had no problems with it. I am always careful not to get it wet when filling the tank. Additionally, after spraying, I always hose out the tank 2 or 3 times, then run clean water through the wand for about a minute. I've never had a clog or any type of malfunction. I've experimented wth other adjustable nozzles and longer wands; waste of money. The original adjustable nozzle and plastic wand work as well as any of the others I've tried. As far as comfort, I really don't pay attention to that. 4 gallons of liquid is heavy, but obviously the weight diminishes rapidly as you spray. I'm very satisfied with this sprayer, especially for the money.

    Dennis F.
    United States United States
    Tank has a consistent stream flowing from Bottom.

    I have tried to use this one time and had nothing but issues with the **** killer flowing down my back. I wasted several gallons and clothes as well. I took the pump and battery apart to check the O ring and there is nothing wrong with it it’s brand new. I put it back together and again a steady stream flowing from the bottom all over the battery. The manual doesn’t address this issue. I can’t believe I spent close to $200.00 on a **** sprayer I can’t even use.


    Hi, we are sorry you have experienced a problem with your 63924 4-Gallon Rechargeable Backpack Sprayer. Please give our Technical Customer Service Team at 800-444-3140, reference this review, and ask for our Customer Service Manager. She will assist you with resolving this issue. Thank you for your comments and for your business, we appreciate it.

    Canada Canada
    Pump and battery failed after less than 2 months

    This sprayer was great at first. But within a month the connections on the battery corroded and fell off. Then I got that sorted out and the pump has now failed and does not pump anything. I am a handy guy and treated this thing right. What a shame. Worst part is I can't even buy a rebuild kit for the pump so I can get it going again. I have always been a Chapin fan and have two of their manual sprayers that I have had for years with no issues. That sure isn't the case with this one...

    United States United States
    Almost did it's job

    The sprayer is good it does it job except the cap doesn't fit tight enough when filled up! You cannot vote it with the cap handle full . The cap will come off an get the battery wet then you down . Trying to put it on your back the cap leaks an runs down on the battery. Battery need to be more waterproof. Thanks John


    Hi, we are sorry you have experienced a problem with your 63924 4-Gallon 24v Rechargeable Backpack Sprayer. If you give our Technical Customer Service Team a call at 800-444-3140 and reference this review, they will assist you with troubleshooting your sprayer to get this issue resolved. If necessary, Chapin will send an expedited new replacement unit, please call our Technical Customer Service Team. Thank you for your comments and for your business, we appreciate it.