Chapin 64800 Backpack Sprayer
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer filter
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer shut-off
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer nozzle
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer filter basket
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer brass nozzle
Chapin 64800 Backpack Sprayer
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer filter
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer shut-off
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer nozzle
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer filter basket
Chapin 64800 4 Gallon ProSeries™ Backpack Sprayer brass nozzle

Chapin 64800 4 Gallon ProSeries™ Professional Landscape Diaphragm Pump Backpack Sprayer

The Chapin 64800 ProSeries™ 4-gallon professional backpack sprayer is designed for landscape applications and comes with a diaphragm pump. It’s compatible with professional pesticides, fertilizers, and weed killers.

64800

Diaphragm pump works with liquid and dry fertilizers, weed killers, and pesticides and the chemical-resistant seals handle tough solutions

3 removable filters: one in the tank, the filter basket under the cap, and one at the shut-off

Right or left mount handle and mounted on a powder-coated steel frame

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Details and features

Chapin 64800 4 Gallon ProSeries™ Professional Landscape Diaphragm Pump Backpack Sprayer

The Chapin 64800 ProSeries™ 4-gallon professional backpack sprayer is designed for landscape applications and comes with a diaphragm pump. It features a rust-resistant, polyethylene tank and the seals are compatible with professional pesticides, fertilizers, and weed killers. Its large pump makes pressurizing quick with less work and the internal 4-position spray valve gives expert pressure control.

Chapin backpacks come 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 or replaced. Its poly wand, cushion grip poly shut-off, adjustable poly-cone nozzle and padded shoulder straps. It’s made in the USA with global materials and backed by Chapin’s 1-year limited warranty.

Applications

Landscape & Professional Lawncare

4-gallon, easy to fill poly tank with 5” tank opening and filter basket

Diaphragm pump works with liquid and dry fertilizers, weed killers, and pesticides and the chemical-resistant seals handle tough solutions

3 removable filters: one in the tank, the filter basket under the cap, and one at the shut-off

Right or left mount handle and mounted on a powder-coated steel frame

Cushion grip poly shut-off, with lock-on feature, and 3 different nozzles for a variety of applications

Padded shoulder straps and lumbar support for comfort

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

Backed by Chapin’s 2-year limited warranty

Related Parts

Chapin 64800 4 Gallon ProSeries™ Professional Landscape Diaphragm Pump Backpack Sprayer

The Chapin 64800 ProSeries™ 4-gallon professional backpack sprayer is designed for landscape applications and comes with a diaphragm pump. It features a rust-resistant, polyethylene tank and the seals are compatible with professional pesticides, fertilizers, and weed killers. Its large pump makes pressurizing quick with less work and the internal 4-position spray valve gives expert pressure control.

Chapin backpacks come 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 or replaced. Its poly wand, cushion grip poly shut-off, adjustable poly-cone nozzle and padded shoulder straps. It’s made in the USA with global materials and backed by Chapin’s 1-year limited warranty.

Additional Replacement Parts Available:

Pump Assembly 6-8183
Hose Assembly 6-8105
Nozzle Assembly 6-8148
Carrying Strap 6-8137
Filter Replacement 6-8169
Worm Gear Clamp 6-8300
Wand Clips 6-8152
Repair Kit 6-8126-8168, 6-8167

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

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 6-8219 20 Inch Poly Spray Wand

Chapin 6-8219 20 Inch Poly Spray Wand

Chapin's 6-8219 20-inch poly wand fits many Chapin backpacks, GP, and tank sprayers.
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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 6-8120B 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 6-8122 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 6-8093 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 6-8131 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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Specification

Chapin 64800 4 Gallon ProSeries™ Professional Landscape Diaphragm Pump Backpack Sprayer

The Chapin 64800 ProSeries™ 4-gallon professional backpack sprayer is designed for landscape applications and comes with a diaphragm pump. It features a rust-resistant, polyethylene tank and the seals are compatible with professional pesticides, fertilizers, and weed killers. Its large pump makes pressurizing quick with less work and the internal 4-position spray valve gives expert pressure control.

Chapin backpacks come 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 or replaced. Its poly wand, cushion grip poly shut-off, adjustable poly-cone nozzle and padded shoulder straps. It’s made in the USA with global materials and backed by Chapin’s 1-year limited warranty.

Model Number 64800
Product Category Backpack Sprayers
Applications Landscape & Professional Lawncare
Warranty 5 year limited
Country of Origin United States
Dimensions (LxWxH) 14.75x9x22
Weight 10 pounds
Assembly Required Yes
Tank Size 4 gallons
Tank Material Poly
Pump Type Diaphragm
Seals Chemical-resistant
Nozzle Material Brass, Poly
Nozzle Patterns Adjustable Brass, Poly Cone, Poly Fan
Nozzle Included Yes
Number of Nozzles 3
Filter 3: In-tank, Shut-off, Filter Basket
Filter Cap Size 5 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 Poly
Operating Pressure 40-60 PSI
Sprayer Rate 0.4-0.5 GPM
Handle Right or Left Mount
Handle Material Powder Coated Steel
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Chapin 64800 4 Gallon ProSeries™ Professional Landscape Diaphragm Pump Backpack Sprayer

The Chapin 64800 ProSeries™ 4-gallon professional backpack sprayer is designed for landscape applications and comes with a diaphragm pump. It features a rust-resistant, polyethylene tank and the seals are compatible with professional pesticides, fertilizers, and weed killers. Its large pump makes pressurizing quick with less work and the internal 4-position spray valve gives expert pressure control.

Chapin backpacks come 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 or replaced. Its poly wand, cushion grip poly shut-off, adjustable poly-cone nozzle and padded shoulder straps. It’s made in the USA with global materials and backed by Chapin’s 1-year limited warranty.

Chapin 64800 4 Gallon ProSeries™ Professional Landscape Diaphragm Pump Backpack Sprayer Product Manual

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Safety & Usage for

Chapin 64800 4 Gallon ProSeries™ Professional Landscape Diaphragm Pump Backpack Sprayer

The Chapin 64800 ProSeries™ 4-gallon professional backpack sprayer is designed for landscape applications and comes with a diaphragm pump. It features a rust-resistant, polyethylene tank and the seals are compatible with professional pesticides, fertilizers, and weed killers. Its large pump makes pressurizing quick with less work and the internal 4-position spray valve gives expert pressure control.

Chapin backpacks come 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 or replaced. Its poly wand, cushion grip poly shut-off, adjustable poly-cone nozzle and padded shoulder straps. It’s made in the USA with global materials and backed by Chapin’s 1-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.

Where to buy Chapin Products

Easily locate trusted retailers or purchase online.
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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.