61800: 4-Gallon (15-Liter) ProSeries Professional Backpack Sprayer


  • $99.99
    Unit price per 
Shipping calculated at checkout.

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Chapin's 4-gallon (15-liter) backpack sprayer with positional pump handle allows you to comfortably control this unit whether you're left or right handed. It comes with chemical-resistant seals for harsher weed control, pest control or fertilizers. The 4-position spray valve gives pressure control from 15 to 60 psi. Multiple nozzles are included.
  • 4-gallon (15-liter) translucent tank
  • Internal 4 position spray valve
  • Multi-use nozzle tips included
  • Positional pump handle
  • Padded carrying straps
  • Chemical-resistant seals

Applications: weed and pest control, fertilizing, fungus control, general purpose cleaning

Can be used for disinfection only when using a diluted mixture of bleach per the CDC guidelines. CDC states: 5 tbsp (1/3 C) of bleach per gallon of room-temperature water or 4 tsp of bleach per quart of room-temperature water.  

Technical Specs

Model Number 61800
Tank Size 4-gallon
Tank Mouth Opening 5-inches
Tank Construction poly
Pump Type piston
Hose Length 48-inches
Hose Material clear reinforced
Shut-Off Material poly cushion-grip
Anti-Siphon Feature N/A
Shoulder strap padded shoulder straps
Battery Type N/A
Spray Hours N/A
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
Handle right or left mount
Shipping Weight In Pounds 10.5
Package Dim. In. (LxWxH) 15.0 x 9.25 x 22.15
Item Dim. In. (LxWxH) 14.75 x 9.0 x 21.9
Item Weight In Pounds 10.5
Pressure relief valve N/A
Extension Wand Material poly
PSI - Operating Pressure 40-60 psi
Motor Size N/A
Spray Stream Max Vertical
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.