Best 4 Gallon Backpack Sprayer – Top 8 of 2021

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We checked out all of the reviews, and put together a list of the best sellers. Check out the top 4 Gallon Backpack Sprayer below.


SaleNo. 1
Field King 190328 Backpack Sprayer, 4 Gallon,
757 Reviews
Field King 190328 Backpack Sprayer, 4 Gallon,
  • Internal No Leak Pump design is safer to use chemicals will not drip down your back. Internal piston pump delivers up to 150 PSI
  • Durable, 21 inch poly wand with the highest quality Viton seals can be used with Wet table powders and liquids for all applications does the...
  • Premium, lockable shut off with brass components and an in-line filter.
  • Easy access pump allows changing of seals in just minutes with no tools
  • 4 nozzles included: brass adjustable, 2 flat fans, and foaming nozzle. Also accepts Tee Jet nozzles.
No. 2
Roundup 190314 Backpack Sprayer for Fertilizers, Herbicides, Weed Killers & Insecticides, 4 Gallon , White
232 Reviews
Roundup 190314 Backpack Sprayer for Fertilizers, Herbicides, Weed Killers & Insecticides, 4 Gallon , White
  • 4-Gallon sprayer meets all your spraying needs (controlling weeds and pests, growing flowers and vegetables and cleaning decks and siding)
  • Heavy-duty poly wand with shut-off featuring a comfort grip, lock for continuous spraying and an in-line filter
  • Viton seals and gaskets throughout the pump and shut-off for long lasting chemical resistance
  • Adjustable padded straps with waist belt and built-in lumbar support
  • Includes 3 nozzles for versatility: poly adjustable, high volume fan, and low volume fan
No. 3
Solo 425 4-Gallon Professional Piston Backpack Sprayer, Wide Pressure Range up to 90 psi
243 Reviews
Solo 425 4-Gallon Professional Piston Backpack Sprayer, Wide Pressure Range up to 90 psi
  • Easily spray liquid disinfectants, fertilizers, herbicides, pesticides with Solo's high-performance piston pump for tree, shrub and plant...
  • Solo’s 425 backpack sprayer includes a 20-inch unbreakable wand that securely connects to a 48-inch nylon-reinforced high-pressure hose...
  • Four easily changeable commercial-grade spraying nozzles-Plastic Adjustable, Fan Spray, Hollow Cone, Jet Stream nozzle and is TeeJet...
  • Designed with a commercial shut-off valve that securely locks in either the on or off position to minimize user fatigue, the pump handle is...
  • Solo's rugged metal frame with an extra-large tank opening makes it easy to fill and clean quickly
No. 4
CHAPIN 61800 4Gal Backpack Sprayer, 4-Gallon, Translucent White
361 Reviews
CHAPIN 61800 4Gal Backpack Sprayer, 4-Gallon, Translucent White
  • Compatible with common fertilizers, weed killers and pesticides
  • 4-Gallon translucent tank with 4-inch wide mouth opening for easy filling and cleaning
  • 3-Stage Filtration system with in-tank removable/cleanable filter
  • Cushion grip poly shut-off with three nozzles for a variety of applications
  • Padded shoulder straps to accommodate a full backpack for hours
SaleNo. 5
CHAPIN 61500 Backpack Sprayer for Fertilizer, 4 gal
554 Reviews
CHAPIN 61500 Backpack Sprayer for Fertilizer, 4 gal
  • 4-Gallon 4-inch wide mouth opening, translucent tank for easy filling and cleaning
  • Compatible with common fertilizers, weed killers and pesticides
  • 2-Stage filtration system, one filter at the top and another filter at shut-off
  • Poly shut-off with 2 nozzles: adjustable poly cone and fan tip
  • Padded shoulder straps to accommodate a full backpack for hours. Seal Material - Nitrile
SaleNo. 6
Husqvarna 4 Gallon Backpack Sprayers, White
  • Internal no leak pump design is safer to use - chemicals will not drip down your back
  • Can be used with wet Table powders and liquids for all applications. Does the work of both a piston and diaphragm backpack
  • Easy access pump, change seals in just minutes with no tools
  • Pump handle can be stored vertically or horizontally
  • Deluxe comfort harness
No. 7
Field King Max 190348 Backpack Sprayer for Professionals Applying Herbicides , White , 4 gallon
281 Reviews
Field King Max 190348 Backpack Sprayer for Professionals Applying Herbicides , White , 4 gallon
  • Internal No Leak Pump design is safer to use - chemicals will not drip down your back.
  • Durable, 21 inch 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.
  • 4 nozzles included: brass adjustable, 2 flat fans, and foaming nozzle. Also accepts TeeJet nozzles.
SaleNo. 8
Chapin International 61575 Bleach & Disinfectant Backpack Sprayer, 4 gal, Translucent White
  • 4-Gallon 4-inch wide mouth opening with removable strainer, translucent tank for easy filling and cleaning
  • Compatible with bleach solutions and fungicides
  • Up to 100 psi of pressure
  • Comfort-grip poly shut-off and reinforced hose, adjustable cone and fan nozzles included
  • Padded shoulder straps to accommodate a full backpack for hours