Chapin 63900 Backpack Sprayer
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer wand with shut-off and nozzle
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer shut-off
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer pump assembly
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer in tank filter
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer cap and basket
Chapin 63900 Backpack Sprayer
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer wand with shut-off and nozzle
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer shut-off
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer pump assembly
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer in tank filter
Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer cap and basket

Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer

The Chapin 63900 4-gallon self-cleaning backpack sprayer is built for professional lawn & landscaping applications, and an excellent tool for homeowners.

63900

4-gallon, easy to fill poly tank

Patented JetClean self-cleaning, piston over diaphragm pump technology

Swing-away handle for right or left hand use and folds up for storage

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Details and features

Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer

The Chapin 63900 4-gallon self-cleaning backpack sprayer is built for professional lawn & landscaping applications, and an excellent tool for homeowners. This backpack sprayer features JetClean™, a self-cleaning pump system, so the filter stays free of debris and virtually eliminates clogs. The pump directs a powerful bust of liquid through the tank filter on every downward pump stroke.

Its 4-gallon polyethylene tank is translucent and rust-resistant so it’s easy to view the liquid level while working and the extra-wide tank opening is wide enough to fill and quickly clean. Like other Chapin backpack sprayers, it comes with a 3-stage filtration system: one filter inside the tank, one filter basket under the tank cap, and one at the shut-off. All are removable so they can be cleaned. The seals are compatible with standard pesticides, fertilizers, and weed killers. It’s made in the USA with global materials and backed by Chapin’s 5-year limited warranty.

Applications

Landscape & Professional Lawncare

4-gallon, easy to fill poly tank with 5.25” tank opening

Patented JetClean self-cleaning, piston over diaphragm pump technology with 3-stage filtration system

Ideal for home and garden tasks with chemical-resistant seals and gaskets for pest and weed control and fertilizing

Stainless-steel wand with cushion grip poly shut-off and 20-inch poly extension wand

Swing-away handle for right or left hand use and folds up for storage

Switch between 3 spray nozzles fan, cone, or adjustable brass depending on your chemical and application

Padded shoulder straps and back pad for hours of comfortable spraying

Compatible with common fertilizers, weed killers and pesticides

Made in the USA with global materials and backed by US-based customer service and technical support

Backed by Chapin’s 5-year limited warranty

Related Parts

Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer

The Chapin 63900 4-gallon self-cleaning backpack sprayer is built for professional lawn & landscaping applications, and an excellent tool for homeowners. This backpack sprayer features JetClean™, a self-cleaning pump system, so the filter stays free of debris and virtually eliminates clogs. The pump directs a powerful bust of liquid through the tank filter on every downward pump stroke.

Its 4-gallon polyethylene tank is translucent and rust-resistant so it’s easy to view the liquid level while working and the extra-wide tank opening is wide enough to fill and quickly clean. Like other Chapin backpack sprayers, it comes with a 3-stage filtration system: one filter inside the tank, one filter basket under the tank cap, and one at the shut-off. All are removable so they can be cleaned. The seals are compatible with standard pesticides, fertilizers, and weed killers. It’s made in the USA with global materials and backed by Chapin’s 5-year limited warranty.

Additional Replacement Parts Available:

Pump Assembly 6-8224 and 6-8225
Hose Assembly 6-8105
Nozzle Assembly 6-8148
Carrying Strap 6-8137-1
Wand Clips 6-8150
Filter Replacement 6-8169
Worm Gear Clamp 6-8300
Repair Kit 6-8153

Please check your local retailer, or call our Order Team (1-800-444-3140), to check availability and purchase.

Chapin 6-8093 Plastic Adjustable Spray Nozzle

Chapin 6-8093 Plastic Adjustable Spray Nozzle

Easily replace your sprayer nozzle and keep one on hand when it's needed. Chapin's 6-8093...
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Chapin 6-8096 Flat Fan Poly Spray Nozzle

Chapin 6-8096 Flat Fan Poly Spray Nozzle

Fan spray nozzles deliver a consistent spray. Chapin's 6-8096 is a poly fan spray nozzle.
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Chapin 6-8122 Brass Adjustable Cone Nozzle

Chapin 6-8122 Brass Adjustable Cone Nozzle

Switch from stream to cone shower by easily twisting the 6-8122 brass spray nozzle based...
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Chapin 6-8131 Complete Elbow Nozzle Assembly with Fan and Adjustable Cone Nozzles

Chapin 6-8131 Complete Elbow Nozzle Assembly with Fan and Adjustable Cone Nozzles

Chapin’s 6-8131 includes 3 nozzles and the elbow attachment. Adjustable brass cone, adjustable poly cone,...
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Chapin 6-8146-2 5.25 Inch Filter Basket with Cap Assembly

Chapin 6-8146-2 5.25 Inch Filter Basket with Cap Assembly

Chapin's 6-8146-2 5.25 inch cap comes with the filter basket, seal, and cap as a...
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Chapin 6-8138 Comfort-Grip Shut-Off Assembly

Chapin 6-8138 Comfort-Grip Shut-Off Assembly

Chapin’s 6-8138 comfort-grip shut-off assembly with lock-on feature gives you fatigue-free spraying.
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Chapin 6-8120B Shut-Off Repair Kit

Chapin 6-8120B Shut-Off Repair Kit for Chapin Comfort-Grip Shut-Off Handles

No need to purchase a new comfort-grip shut-off handle when you can simply repair it....
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Chapin 6-8173 20 Inch Chrome Spray Wand

Chapin 6-8173 20 Inch Chrome Spray Wand

Update or upgrade your sprayer wand. Chapin's 6-8173 20-inch chrome wand fits our ProSeries backpack...
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Specification

Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer

The Chapin 63900 4-gallon self-cleaning backpack sprayer is built for professional lawn & landscaping applications, and an excellent tool for homeowners. This backpack sprayer features JetClean™, a self-cleaning pump system, so the filter stays free of debris and virtually eliminates clogs. The pump directs a powerful bust of liquid through the tank filter on every downward pump stroke.

Its 4-gallon polyethylene tank is translucent and rust-resistant so it’s easy to view the liquid level while working and the extra-wide tank opening is wide enough to fill and quickly clean. Like other Chapin backpack sprayers, it comes with a 3-stage filtration system: one filter inside the tank, one filter basket under the tank cap, and one at the shut-off. All are removable so they can be cleaned. The seals are compatible with standard pesticides, fertilizers, and weed killers. It’s made in the USA with global materials and backed by Chapin’s 5-year limited warranty.

Model Number 63900
Product Category Backpack Sprayers
Applications Landscape & Professional Lawncare
Warranty 5 year limited
Country of Origin United States
Dimensions (LxWxH) 14.75x9x22
Weight 10.5 pounds
Assembly Required Yes
Tank Size 4 gallons
Tank Material Poly
Pump Type Piston Over Diaphgragm
Seals Chemical-resistant
Nozzle Material Brass, Poly
Nozzle Patterns Adjustable Brass, Poly Cone, Poly Fan
Nozzle Included Yes
Number of Nozzles 3
Filter Self-cleaning, 3-Stage: In-tank, Shut-off, Filter Basket
Filter Cap Size 6 inches
Lock-on Feature Yes
Shut-off Material Poly, Cushioned Grip
Hose Length 48 inches
Hose Material Reinforced PVC
Wand Length 20 inches
Wand Material Stainless Steel
Operating Pressure 40-60 PSI
Sprayer Rate 0.4-0.5 GPM
Handle Right or Left Mount
Handle Material Metal-Alloy
Downloads

Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer

The Chapin 63900 4-gallon self-cleaning backpack sprayer is built for professional lawn & landscaping applications, and an excellent tool for homeowners. This backpack sprayer features JetClean™, a self-cleaning pump system, so the filter stays free of debris and virtually eliminates clogs. The pump directs a powerful bust of liquid through the tank filter on every downward pump stroke.

Its 4-gallon polyethylene tank is translucent and rust-resistant so it’s easy to view the liquid level while working and the extra-wide tank opening is wide enough to fill and quickly clean. Like other Chapin backpack sprayers, it comes with a 3-stage filtration system: one filter inside the tank, one filter basket under the tank cap, and one at the shut-off. All are removable so they can be cleaned. The seals are compatible with standard pesticides, fertilizers, and weed killers. It’s made in the USA with global materials and backed by Chapin’s 5-year limited warranty.

Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer Product Manual

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Safety & Usage for

Chapin 63900 4 Gallon Self-Cleaning Backpack Sprayer

The Chapin 63900 4-gallon self-cleaning backpack sprayer is built for professional lawn & landscaping applications, and an excellent tool for homeowners. This backpack sprayer features JetClean™, a self-cleaning pump system, so the filter stays free of debris and virtually eliminates clogs. The pump directs a powerful bust of liquid through the tank filter on every downward pump stroke.

Its 4-gallon polyethylene tank is translucent and rust-resistant so it’s easy to view the liquid level while working and the extra-wide tank opening is wide enough to fill and quickly clean. Like other Chapin backpack sprayers, it comes with a 3-stage filtration system: one filter inside the tank, one filter basket under the tank cap, and one at the shut-off. All are removable so they can be cleaned. The seals are compatible with standard pesticides, fertilizers, and weed killers. It’s made in the USA with global materials and backed by Chapin’s 5-year limited warranty.

  • 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.
  • Multiple chemicals in one sprayer can cause cross contamination, even if you clean your sprayer after each use.
  • Do not store chemicals in your sprayer when not in use
  • Always wear eye protection. Do not spray during windy conditions. Clean sprayer thoroughly after each use. Before using read and understand chemical manufacturer’s instructions and warnings as well as those above. FAILURE TO HEED ALL SAFETY WARNINGS AND INSTRUCTIONS COULD RESULT IN SERIOUS BODILY INJURY OR PROPERTY DAMAGE.

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Need Help?

Frequently Asked Questions

Our technical team can help! Give them a call at 1-800-444-3140, option 1, or email them at [email protected].

Our order team can help! Give them a call at 1-800-444-3140.

Chapin has 4 levels of warranties on our products: 1 year, 2 years, 5 years, and limited lifetime warranties. Parts and certain accessories do not have warranties. Check our Warranty page for an explanation of each warranty level. Your warranty will be listed on your packaging and/or product manual. Please register your product after purchase to access your warranty.

Your product manual will have all replacement parts listed for your sprayer. Some manuals include multiple sprayer models, so your particular sprayer may not include all the parts pictured in the manual. If you have additional questions on parts, please call Technical Support at 1-800-444-3140, option 1.

Chapin sprayers and spreaders are manufactured in the United States. A percentage of our internal components do come from outside the United States.

The majority of our watering products are not made in the United States. Our watering can is made 100% in the United States with recycled materials.

Only our battery-operated products include an SDS. This is specifically for the battery included with the unit. Chemicals are not included with any sprayer, sprayer, or watering product. Always review the SDS that comes with whatever chemical or solution you’re spraying or spreading and consult with technical team if you have any questions. 1-800-444-3140, option 1.

You can purchase Chapin products directly from any of the retailers located on our website, www.chapinmfg.com. Always check with your local retailer for availability. If you’re outside of the United States and are unsure, please call our order team at 1-800-444-3140.