Chapin ProSeries Professional Backpack Sprayer 4gal Capacity

High-Capacity Backpack Coverage Without the Fatigue, 4gal

Covering a large growing area with a hand-carry pump sprayer means constant refills and an arm that tires out long before the job is done. The Chapin ProSeries Professional Backpack Sprayer moves the load to the shoulders instead, with a 4-gallon chemical-resistant poly tank that carries enough volume for extended runs and a positional pump handle that works for both left- and right-handed operators.

Chapin's 3-stage filtration keeps the spray line clean, and chemical-resistant seals hold up against harsher weed killers, pesticides, and fertilizers, with multiple nozzles included for different application patterns.

Key Features & Benefits

• Positional pump handle — works on either side, so left- and right-handed operators can pump comfortably without adjustment.
• Chemical-resistant seals — rated for harsher formulations including concentrated weed killers, pesticides, and fertilizers.
• 3-stage filtration system — removes particulate debris at three points in the flow path for consistently clean output.
• 4-gallon translucent poly tank — high-capacity, rust-resistant construction cuts refill frequency on large jobs.
• Multiple nozzles included — switch between fan, cone, and stream patterns without buying separate accessories.

Who Should Use This

Cultivators and operations managing large growing areas who need to apply pest control, fertilizers, or weed management products over extended runs are the direct fit, since the backpack carry system distributes tank weight far more comfortably than a hand-carry sprayer.

About Chapin

Chapin International's equipment lineup dates back to 1884, with manufacturing today spread across its long-standing Batavia, New York plant and a Kentucky facility.

Frequently Asked Questions

What does "positional pump handle" mean?

The pump handle can be mounted on either side of the backpack unit. This lets both left- and right-handed users pump with their dominant hand without any tool-based adjustment.

How does the 3-stage filtration work?

Chapin's system filters the chemical solution at multiple points as it moves from tank to nozzle, removing progressively finer particulate at each stage. This protects the nozzle from clogging even with less-filtered input solutions.

How do I adjust the backpack unit for a comfortable fit?

The harness is adjustable for different torso sizes. Don the unit like a standard backpack, tighten the shoulder straps for a snug fit, and adjust until the tank sits centered without swaying during movement.

What nozzles are included?

This sprayer includes multiple nozzle types covering fan, cone, and stream spray patterns. Refer to the product documentation for the specific nozzle configuration shipped with this unit.