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Chapin 4-gallon ProSeries Professional Manual Backpack Sprayer

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

Chapin's 61800 4-gallon professional 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. Multiple nozzles are included: adjustable brass, adjustable poly, and poly fan tip. Its chemical-resistant poly tank is rust resistant and translucent. The backpack comes with Chapin’s standard 3-stage filtration system. Backed by Chapin’s 2-year limited warranty and made in the USA with global materials.

  • 4-gallon durable poly tank: durable 4-gallon translucent poly tank lets you see the tank capacity while filling and working, tank is durable and compatible with standard lawn and garden chemicals; 5.25-inch opening with filter cap to help catch debris when filling tank
  • Made in the USA with global materials: designed and produced in the USA with US-based customer service and technical support, located at Chapin’s home base in Batavia, NY; backed by Chapin’s 2-year limited warranty
  • 3-stage standard filtration system: one filter is located in the shut-off, one inside the tank, near the pump, and the other as a basket with the tank cap; 3 different locations to catch debris before it clogs up your sprayer while working
  • Components: adjustable padded shoulder straps, 20-inch poly extension wand and 48-inch reinforced hose, poly, cushioned grip, shut-off with lock-on feature
  • Three spray nozzles included: dial your spray from coarse stream to shower with either the brass or poly nozzles, spray a fan with the poly fan tip spray nozzle
  • Chemical compatibility: chemical-resistant elastomer seals handle professional fertilizers, pest and weed control products or general cleaning solutions

Chapin 4-gallon ProSeries Professional Manual Backpack Sprayer

Excluding Sales Tax
  • Technical Specs

    Model Number


    Tank Size (gallons)


    Tank Mouth Opening (inches)


    Tank Material


    Pump Type


    Hose Length (inches)


    Hose Material

    clear, reinforced

    Extension Wand Length (inches)


    Extension Wand Material


    Seal Material


    Shoulder Straps



    adjustable brass cone, poly-fan, adjustable poly-cone




    left or right mount, powder coated

    Frame Material


    Shut-off Material

    poly cushion-grip

    Lock-on Feature


    Pressure Relief Valve


    Spray/Flow Rate (GPM)

    0.4 - 0.5

    Operating Pressure (PSI)

    40 - 60

    Item Dimensions (L x W x H – inches)

    14.75 x 9 x 21.9

    Item Weight (pounds)

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