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Chapin ProSeries Backpack Sprayer -- Diaphragm Pump 4-gal.

Item No: 163123


Chapin® Diaphragm Pump 4-gallon Backpack Sprayer

  • Diaphragm pump is designed for wettable powders
  • 4-position pressure adjustment
  • Fan, brass and cone nozzles included

Chapin® has provided professional-grade sprayers ever since they patented the first U.S. pump sprayer in 1902. The new ProSeries™ continues the tradition of excellence by providing the features you need at a reasonable price. This 4-gal. diaphragm pump backpack sprayer is designed for use with wettable powders, which may cause wear to piston pumps. Features Viton® seals, a 20" poly wand, 48" spray hose, and padded shoulder and waist straps. Other features include a four-position pressure adjustment from 15 to 60 psi, fan and cone nozzles and a brass adjustable nozzle. Pump handle can be positioned on the right or left side. USA made.

View all sprayers

2014 Master Catalog: Page 281

Product Reviews


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Chapin ProSeries Backpack Sprayer -- Diaphragm Pump 4-gal.

(based on 1 review)

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(0 of 4 customers found this review helpful)


Great Product

By Herb

from Seattle

About Me Professional Landscaper

Verified Buyer


  • Adjustable Settings
  • Easy to Use
  • Even Dispersal
  • Solid Construction


    Best Uses

      Comments about Chapin ProSeries Backpack Sprayer -- Diaphragm Pump 4-gal.:


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      Capacity:4 gal.
      Pressure Cylinder:Internal
      Pump Style:Diaphragm
      Maximum Pressure:60 psi
      Average Spray Height:20-25ft.
      Pressure Gauge:Included
      Nozzle Tip:Cone, flat, brass adj.
      Filter:In handle
      Herbicide Compatibility:Yes
      Pesticide Compatibility:Yes
      Cleaner Compatibility:Yes
      Acid Compatibility:No
      Backpack Sprayers Comparison Chart

      Online Documents

      • Owner's Manual - Chapin ProSeries Backpack Sprayer -- Diaphragm Pump 4-gal.
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      Reference Number: 25WW101
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