FIELD KING 190328 Backpack Sprayer, 4 Gallon, with Internal No Leak Pump

The FieldKing 190328 Backpack Sprayer is a 4-gallon manual sprayer built for property owners and landscapers who handle liquids and wettable powders. Its primary advantage is an internal piston pump design that prevents chemicals from leaking onto your back during application while still reaching operating pressures up to 150 PSI.

Spraying versatility comes from a 21-inch poly wand fitted with Viton seals, a lockable shut-off valve with brass components, and an integrated in-line filter. The package includes six specific nozzles right out of the box: an adjustable brass nozzle, high-volume wide fan, low-volume wide fan, low-volume narrow fan, jet stream, and a foaming nozzle. It also accepts industry-standard TeeJet nozzles if you have specialized spray patterns you prefer.

Routine maintenance is straightforward thanks to an accessible pump assembly. You can swap out internal seals in just minutes without reaching for extra tools, keeping downtime minimal during busy workdays.

Because this model holds four gallons and builds up to 150 PSI through an internal manual piston, carrying it at full capacity requires physical effort. The listing also focuses heavily on the pump and nozzle mechanisms without specifying strap padding or overall empty unit weight.

Verdict: The FieldKing 190328 is a dependable, leak-conscious choice for anyone needing high-pressure application across a wide range of liquids and powders. Its tool-free upkeep and broad nozzle selection make it a practical pick for regular outdoor property maintenance.

• Tank Capacity: 4 Gallon
• Maximum Pressure: Up to 150 PSI
• Wand Length: 21 inches
• Wand Material: Poly
• Seal Type: Viton
• Included Nozzles: 6 (brass adjustable, brown wide fan, red wide fan, yellow narrow fan, orange jet stream, black foaming)
• Compatibility: Liquids, wettable powders, TeeJet nozzles

A great fit if you:

• Need to spray both standard liquids and wettable powders without switching equipment
• Want an internal pump design to avoid chemical leaks down your clothing
• Require high-pressure spray patterns up to 150 PSI
• Value having multiple nozzle choices for foaming, stream, and fan patterns

Consider something else if you:

• Prefer a motorized or battery-powered sprayer that eliminates manual pumping
• Only need a very small handheld bottle for quick indoor plant care

What nozzles are included in the box?
It comes with six nozzles: an adjustable brass nozzle, high volume wide fan (brown), low volume wide fan (red), low volume narrow fan (yellow), jet stream (orange), and foaming (black).

Can this sprayer handle wettable powders?
Yes, the 21-inch poly wand and Viton seals are designed to work with both liquids and wettable powders, performing the work of both piston and diaphragm backpacks.

Can I use third-party nozzles on this unit?
Yes, the sprayer accepts standard TeeJet nozzles in addition to the six included nozzles.