Chapin 4 Gallon Self-Cleaning Backpack Sprayer With Hand Sprayer Combo

Sprayer - Model #63900

  • Backpack features 4-Gallon translucent tank with extra wide 6-inch mouth opening for easy filling and cleaning
  • Patented JetClean self-cleaning pump technology with 3-stage filtration system to keep filter clog-free from debris and residue
  • Stainless-steel wand with cushion grip poly shut-off and 3 nozzles: fan, cone and adjustable brass
  • Swing-away handle for right or left hand use, folds up for storage. Padded shoulder straps and back pad
California Warning


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



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More Information

Product Summary

Best in class, ease and innovation combined, the Chapin Self-Cleaning Backpack sprayer is loaded with features for the DIY Homeowner yet rugged enough for the Professional. Boasting the innovative and patented JetClean, self-cleaning pump technology, that directs a powerful burst of liquid through the tank filter with each downward pump stroke. The filter stays free of debris – virtually eliminates clogging! The benefits continue with a 4-Gallon translucent poly tank that has an extra-wide, 6-inch mouth opening for easy filling and cleaning, a 3-stage filtration system, cushion grip poly shut-off, 3 nozzles for a variety of applications and a stainless-steel wand. Another innovative feature is the swing-away pump handle that can be set up for either right or left-hand use and it folds up when you’re done, providing more compact storage. Padded shoulder straps and back pad will give you hours of comfortable spraying. Compatible with common fertilizers, weed killers and pesticides.

Technical Specs

Model Number
Spray/Flow Rate (GPM)
.4-.5 gpm
Tank Size
4 Gallon
adjustable brass cone, poly-fan, poly-cone,
Tank Mouth Opening
6 Inches
Self-cleaning, handheld comes with in-tank filter
Tank Construction
Chrome-plated steel
Pump Type
Piston over diaphragm
Seal Material
Right or left mount
Hose Length
48 Inches
Shipping Weight In Pounds
Hose Material
Clear reinforced
Package Dim. In. (LxWxH)
Shut-Off Material
Poly cushion-grip
Item Dim. In. (LxWxH)
Item Weight In Pounds
Extension Wand Length
20 Inches
Shoulder strap
Deluxe padded straps with lumbar support
Extension Wand Material
stainless steel
PSI - Operating Pressure
40-60 PSI
Spray Stream Max Vertical
23 Feet
Spray Stream Max Horiz.
25 Feet
5 Year Limited

Replacement Parts

Replacement parts for this product are not available in our web store. Please contact customer service at 1-800-950-4458 for more information.