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Field King Max 190348 Backpack Sprayer for Professionals Applying Herbicides

4.5 4.5 out of 5 stars 1,837 ratings
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Amazon's Choice in Lawn & Garden Sprayers by Field King

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Purchase options and add-ons

Brand Field King
Tank Volume 4 Gallons
Color White
Material Stainless Steel,Brass
Item Weight 12.8 Pounds

About this item

  • 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 Tee Jet nozzles.

Customer ratings by feature

Sturdiness
4.7 4.7
Sheerness
4.5 4.5
Easy to assemble
4.4 4.4
Easy to use
4.4 4.4

Frequently bought together

$106.99
Get it as soon as Wednesday, Mar 27
In Stock
Ships from and sold by Amazon.com.
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$13.19 ($0.82/Fl Oz)
Get it as soon as Wednesday, Mar 27
In Stock
Ships from and sold by Amazon.com.
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$13.99 ($1.75/Fl Oz)
Get it as soon as Wednesday, Mar 27
In Stock
Sold by Bluewater Chemgroup and ships from Amazon Fulfillment.
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Field King Max 190348 Backpack Sprayer for Professionals Applying Herbicides
Field King Max 190348 Backpack Sprayer for Professionals Applying Herbicides
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Price$106.99$89.99$79.99$289.42$92.97-15% $105.96
List:$124.99
Delivery
Get it as soon as Wednesday, Mar 27
Get it as soon as Saturday, Mar 30
Get it as soon as Thursday, Mar 28
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Customer Ratings
Easy to assemble
4.4
3.2
2.7
4.4
4.5
Easy to use
4.4
3.7
4.2
4.3
4.3
Value for money
4.2
3.5
4.0
4.1
4.6
Battery life
3.7
4.3
4.3
Maneuverability
3.4
3.0
5.0
Sold By
Amazon.com
Amazon.com
WOEKBON
Amazon.com
NPGLOBAL
Amazon.com
tank volume
4 gallons
4 gallons
4 gallons
4.2 gallons
4 gallons
power source
Manual
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Hand Powered
material
Stainless Steel,Brass
High Density Polyethylene (HDPE)
Polypropylene (PP)
🏆Top1 Backpack Sprayer
Plastic
number of items
1
1
1
style
Sprayer
4 Gal
Compact
Backpack
Translucent
4 Gallon

From the manufacturer

Field King Professional Sprayers

Features

No Leak Internal Pump

The internal pump does the work of a piston or diaphragm backpack sprayer but also keeps your back dry.

Pressure reaches 150 PSI to spray hard-to-reach areas up to 30 ft.

Built-in Agitator

Internal paddles, activated by pump action, keeps them mixed and ready to spray. Can handle liquids, powders, and water-soluble solutions.

Viton Seals and Gaskets

The highest quality Viton seals throughout for maximum chemical resistance. Perfect for herbicides, weed killers, insecticides, fertilizers, and more.

Repair Pump in Minutes

Patented pump design has minimal high-wear parts (60% less than the competition) and can be repaired in minutes without tools. Less down time.

Stainless Steel Wand and Professional Shut-Off

The premium shut-off offers a comfort grip, lockable trigger to prevent hand fatigue, and a removable in-line filter to reduce clogging.

Filtration Basket

Large tank opening with filtration basket keeps large debris out of tank while filling.

Secure Handle with No Slack

Threaded bolt to attach handle with no jiggling (far superior to a typical cotter pin found in competing products).

Deluxe Harness & Folding Handle

Breathable, full coverage, padded ballistic nylon harness with adjustable chest clip and lumbar support to keep the sprayer in place at a consistent level with no bouncing.

Foldable pump handle makes it easier to store. Also handle can be reversed for left-or right-handed use.

Product information

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Field King Max 190348 Backpack Sprayer for Professionals Applying Herbicides


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Product Description

Field King Max 190348 Professional No Leak Pump Backpack Sprayer does the work of a piston or diaphragm backpack sprayer. The exclusive internal No Leak Pump keeps your back and clothing dry. The paddles keep liquids, powders, and water-soluble solutions mixed, in solution, and ready to spray. Also the pump features Viton seals that can be easily changed within minutes without tools up to 7x faster than the leading competitor. The premium shut-off offers a comfort grip, lockable trigger to prevent hand fatigue, and a removable in-line filter to reduce clogging. The Field King Max 190348 Backpack Sprayer is capable of spraying up to 150 PSI - perfect for those hard-to-reach areas. The included pressure regulator maintains a low, continuous 25 PSI great for spraying herbicides. The foldable pump handle reverses for left- or right-handed use, and the tank has a built-in carry handle with wand storage. Our deluxe harness features a full back pad, wide support waist belt and chest cinch strap ensuring comfort while you work. Multiple nozzles are included for ultimate versatility: brass adjustable nozzle enables stream to cone patterns, wide flat fan nozzle red, 0.25 GPM, angled at 70°, narrow flat fan nozzle yellow, 0.15 GPM, angled at 30°, and foaming nozzle. Also accepts TeeJet nozzles.

Customer reviews

4.5 out of 5 stars
4.5 out of 5
1,837 global ratings

Customers say

Customers like the value, ease of use, adjustability, and quality of the pump sprayer. For example, they mention it's worth the investment, the instructions are clear, and it fits well. Opinions are mixed on portability and the pump.

AI-generated from the text of customer reviews

363 customers mention317 positive46 negative

Customers like the quality of the sprayer. For example, they say it's a solid sprayer, well-built, and has a quality feel. Some mention that the nozzle is holding up and that the harness is an improvement over the Model 190328.

"...The use of a sharpie has worked well, but out-the-box highly visible markings would make this sprayer THAT much better...." Read more

"...Cost to repair is about the purchase cost. The SwisMex is a solid sprayer and I rate it just behind the Field King...." Read more

"Very well made.It's a wonderful machine, not to heavy, easy to use. Good quality in materials." Read more

"...It comes with 4 nozzles, for different applications. I have only used the high volume fan, and the foaming nozzles so far...." Read more

129 customers mention110 positive19 negative

Customers like the ease of use of the pump sprayer. They say it's easy to set up and function, operate, and clean. They also say the instructions are clear, the assembly was extremely easy, and the handle went together quickly. Customers also mention that the pump lever action requires little effort and the spray pattern is consistent for about 10 seconds.

"...Also, the trigger lock can be manipulated with ease while wearing latex or leather gloves...." Read more

"...The Field King has a very good (comfortable) harness that is easy to manage...." Read more

"Very well made.It's a wonderful machine, not to heavy, easy to use. Good quality in materials." Read more

"...Once you get the hang of the pumping action while spraying, it is quite easy to use...." Read more

114 customers mention90 positive24 negative

Customers like the comfort of the pump sprayer. For example, they mention it's quite comfortable to lift on your back, use and carry, and has ergonomic features to fine tune to the user. That said, some say the comfortable backpack strap works perfectly.

"...Pumping is almost effortless, though repetitive, still comfortable. If feeling resistance, tank pressure is near max...." Read more

"...The Field King has a very good (comfortable) harness that is easy to manage...." Read more

"...up to 4 gallons, and once you manage to lift it on your back, is quite comfortable.It comes with 4 nozzles, for different applications...." Read more

"This sprayer is fantastic. Comfortable and functional. The agitator is important for products that are Water Dispersible Granules...." Read more

74 customers mention52 positive22 negative

Customers like the leakage of the pump sprayer. They say it's well-sealed, well-built, and hasn't had any leaks.

"...All connections are well sealed and do not leak...." Read more

"...It is well built, comes with the accessories you need, doesn't leak, etc., etc...." Read more

"...But, I could no longer get repair parts for it. It started leaking badly and I destroyed the connector at the bottom of the pump trying to seal it...." Read more

"...The pump and handle seem good - no leaks...." Read more

52 customers mention42 positive10 negative

Customers like that the pump sprayer is adjustable. They say it fits them well, with the wide shoulder straps and complete adjustability. They also appreciate the well-padded shoulder strap and hip straps that fit comfortably. Customers also mention that the fill top includes a custom fit, removable particulate filter to stop clumps from DG. They mention that it's easier to carry with the adjustable straps.

"...The different tips (tight fan, wide fan, and adjustable brass nozzle) are great. It will pump up to either high 2 digit or low 3 digit psi...." Read more

"The fit on this sprayer is great....much better than less expensive models...." Read more

"...Straps are high quality and actually padded! Fill top includes a custom fit, removable particulate filter to stop clumps from DG or powder products..." Read more

"...I feel so much better being able to spray high and also to quickly adjust the sprayer. I am getting much better coverage of my trees...." Read more

46 customers mention42 positive4 negative

Customers appreciate the value of the pump sprayer. They say it's a great product for the price, and worth the investment.

"...Overall, this is a sprayer with consistently good performance at a reasonable price." Read more

"...The more I think about it the more astounded I am that this was so inexpensive...." Read more

"...sprayers in 25yrs of spraying, I’m going to say this is the best backpack for the money. Are there better ones? Yes...." Read more

"Good price and very fast shipping thanks" Read more

90 customers mention61 positive29 negative

Customers are mixed about the pump. Some mention that it's easier to pump than the other ones they have, and it builds pressure easily. However, others say that it requires virtually constant pumping to maintain pressure.

"...This one, the Field King....cap seals TIGHT. The opening is wide with a removable strainer, and it has an inline filter...." Read more

"...gallon tank sprayers, this is much better, since you can maintain a fairly consistent pressure while spraying..." Read more

"...issue is that, unlike one gallon sprayers, it requires virtually constant pumping to maintain pressure. This is the dealbreaker for me...." Read more

"...takes a lot of weight off your shoulders, and the ability to pump the handle continuously means you can keep the unit pressurized for a forceful..." Read more

61 customers mention26 positive35 negative

Customers are mixed about the portability of the pump sprayer. Some mention that it's a wonderful machine, not too heavy, easy to use, and light enough for a small woman to use. However, others say that it is a bit heavy when you fill it to the top, the lumbar strap carries no weight, and the metal wand is heavy.

"...with 4 gallons of liquid is a little awkward and might be too heavy for some people." Read more

"Very well made.It's a wonderful machine, not to heavy, easy to use. Good quality in materials." Read more

"...First, it is very difficult to carry three or four gallons of liquid on your back...." Read more

"...Though I should note it is by no means unnecessarily heavy (that is, no heavier than 5 gallons on your back would otherwise be haha)...." Read more

Much Better, Much Much Better
5 Stars
Much Better, Much Much Better
This unit, Model 190348, is a replacement / upgrade for the Model 190328 which has a pump handle that is not as pictured, i.e., it stays in a horizontal, not vertical, position for storage.The Model 190348 was received on schedule with no issues. The packing box had a single layer of tape indicating that the unit was new and not a used/refurbished unit. Assembly was quick and required no special tools, just 2 half inch wrenches. I tried the unit out after assembly and it worked fine, better than anticipated in fact. Additionally, the harness is an improvement over the Model 190328, but unless you’re going to spend long periods of time with the sprayer I’m not sure this would be the extra money for the improved harness. When I went to put the unit away, I noticed that the pump handle would not move to the vertical position. After a quick look I noticed that the pump handle has 2 holes set at 90 degrees. The solution is simple, remove the nut and bolt, move the handle 90 degrees upward and reinstall the nut and bolt. Simple, but time consuming.But there is a solution, a very simple solution to this issue. First, remove the nut and bolt, now store them somewhere out of the way, you’re not going to need them. Second, get a clevis pin, example in the second photo, and put it through the hole in the handle and pump shaft mechanism. Third, secure the clevis pin in place and you’re done. Want the handle down, remove the pin, move the handle down 90 degrees, put the pin back in and secure. Ready to put the sprayer away, remove the pin, move the handle up 90 degrees, put the pin back in and secure. This takes way, way less time than getting 2 wrenches to loosen the nut from the bolt and then un thread the bolt from the handle/pump shaft. I should note that in my case, the diameter of the clevis pin was perfect for the hole through the handle but a little large for the treaded hole in the pump shaft. As I had a pin and it fit the large of the two holes the solution to the problem was to drill out the threads in the pump shaft. The increase in diameter necessary to accommodate my pin was 0.050 inches. Not enough to decrease the integrity of the pump shaft. In fact a portion of the threads was still observable in the pump shaft hole. If you don’t want to drill out the pump shaft just buy a clevis pin of the appropriate diameter. I would not suggest significantly increasing the diameter of the holes through the pump handle. No point in potentially reducing its integrity.So, in recap, this is a great sprayer and can be made even easier to use by replacing the bolt and nut securing the pump handle in place with a clevis pin.
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Top reviews from the United States

Reviewed in the United States on May 18, 2018
4 people found this helpful
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Reviewed in the United States on December 27, 2023
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Reviewed in the United States on September 4, 2021
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Reviewed in the United States on March 6, 2024

Top reviews from other countries

Rob
5.0 out of 5 stars Works incredibly well with thick fluids
Reviewed in Canada on September 22, 2023
John
5.0 out of 5 stars Arrived on time and in good order
Reviewed in Australia on June 13, 2021
Chris Compeau
5.0 out of 5 stars High quality
Reviewed in Canada on March 27, 2023
One person found this helpful
Report
Katie Kat
3.0 out of 5 stars Does the job
Reviewed in Australia on December 27, 2023
ormie
4.0 out of 5 stars Wise choice
Reviewed in Canada on June 25, 2022
One person found this helpful
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