Field King

Field King® Max 190348 Backpack Sprayer for Professionals

The Field King® Max 190348 Backpack Sprayer for Professionals is a 4-gallon backpack sprayer from Field King, designed and built by The Fountainhead Group. It uses Viton seals. Find it at retailers nationwide, and order genuine replacement parts direct.

Internal No Leak Pump design is safer to use - chemicals will not drip down your back.
Built-in Agitator, Internal paddles, activated by pump action, keeps them mixed and ready to spray. Can handle liquids, powders, and water-soluble solutions.
Durable, 21 inch poly-lined stainless steel wand with the highest quality Viton® seals for chemical resistance.
Premium, lockable shut off with brass components and an in-line filter.

Best for Pros applying herbicides who want a stainless wand & TeeJet tips

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Features

Internal No Leak Pump design is safer to use - chemicals will not drip down your back.
Built-in Agitator, Internal paddles, activated by pump action, keeps them mixed and ready to spray. Can handle liquids, powders, and water-soluble solutions.
Durable, 21 inch poly-lined stainless steel wand with the highest quality Viton® seals for chemical resistance.
Premium, lockable shut off with brass components and an in-line filter.
Easy access pump: Change seals in just minutes with no tools.
Deluxe harness included with back pad and lumbar support for all day comfort.

Specifications

TypeBackpack Sprayer
Model / item #190348

Performance

Standout featureBuilt-in agitator; foldable handle; lumbar harness
Flow / PressureUp to 150 PSI (25 PSI regulated)
PowerManual no-leak pump + built-in agitator
RuntimeUnlimited (hand pump)

Build & components

Tank4 gal poly
Wand21" stainless steel
Hose9/16" x 50" reinforced
Nozzles6 incl. 2 brass flat fans; TeeJet compatible
SealsViton, tool-free swap

Ownership

Warranty1 year

Downloads

Owner's manual PDF · opens in a new tab

Chemical compatibility

See which chemicals match this sprayer's Viton seal material before you spray. Always confirm against the chemical's Safety Data Sheet.

Check chemical compatibility

Where to buy

Two different things, two places to get them.

Buy this sprayer

Order direct from The Fountainhead Group, or find it at home, garden, and farm retailers nationwide.

Buy direct Where to buy

Genuine FGI parts

Replacement parts

Order genuine replacement parts matched to this exact model, shipped direct from our parts store.

27 genuine parts matched to this model

Parts for this model

Help & FAQ

Questions about this product or chemical compatibility?

Our team can help. Call (800) 311-9903 or email info@thefgi.com. You can also check seal compatibility with our Compatibility Tool.

What's the warranty, and how do I register?

This model carries a 1 year warranty. Register your product on our Warranty & Registration page to activate coverage.

How do I find replacement parts?

This model has its own parts collection. Open Parts for this model to order genuine replacement parts shipped direct.

Where do I find chemical safety (SDS) information?

Always read the chemical manufacturer's label and Safety Data Sheet (SDS) before use. Our Compatibility Tool shows seal-material compatibility, but the SDS is the authority for handling and safety.

Are FGI products made in the USA?

Yes. The Fountainhead Group has manufactured sprayers in New York since 1888.