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Leonard SprayMax Pro 400 Sprayer

  • 4 Stars
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$ 402.99
> 5
$ 390.65
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# PRO-400
In Stock
Weight: 12.15 lbs

Made for professionals to tackle any spraying task!

The SprayMax Pro 400 is a one of a kind sprayer designed with professionals in mind. This sprayer features a four-gallon tank with a two-speed switch. An 18-volt lithium-ion battery supplies power to the unit and recharges with the included fast charger. Each sprayer also includes both a low-flow and a high-flow all-metal tip set and a telescopic wand. The wand extends from 20 inches to 39 inches in length, allowing you to spray in hard to reach areas. You can transport the unit with the ergonomic handle or wear it as a backpack sprayer thanks to the extra-padded straps.

The SprayMax Pro 400 ensures you have the right coverage no matter your task. The two-speed switch gives you direct control over how much you spray. Both the low-flow and high-flow tip sets allow for a pin/cone and fan spray. Its lithium-ion battery provides two hours of constant operation to outlast the competition.

To customize your sprayer, check out our complete selection of SprayMax accessories. Quick-attach fittings make it easy to connect any of our wands and hoses to your sprayer. For an extra mode of transport, consider adding a SprayMax Pro Cart or purchase them together and save some cash!


  • Tank capacity (gallons): 4
  • Battery type: Lithium-ion
  • Battery voltage (volts): 18
  • Operation time on full charge (hours): 2
  • Charger voltage (volts): 120
  • Wand length (inches): 20 to 39

Product Features

  • Battery-operated sprayer
  • Two-speed switch
  • Lithium-ion battery
  • Charger included
  • Low-flow/high-flow tip sets
  • Telescoping spray wand
  • Ergonomic handle
  • Quick attach fittings

Product Safety

Prop 65


We cover this product with a three-month warranty against manufacturer defects.


Review Summary (Based on 3 Reviews)

4 Stars

Great sprayer, poor straps wrote

Pros: wand quality is fantastic. The spray quality and variability is awesome. The battery life is very good. I use this in a commercial setting doing ten mosquito treatments a day. An extra battery comes in handy. Cons: The straps are an absolute joke. They are not comfortable and very cheap. For the price of this sprayer, they should be padded the entirety of the backpack straps vs a 6" area of padding. Please fix this and give us something similar to a Stihl BR 600 strap setup. Overall I enjoy the sprayer, and it performs. But when you spend this money, look for one with high quality straps if you intend to use it for a long time or daily.

3 Stars

Great sprayer, poor straps wrote

First off, I am a licensed pesticide applicator in Michigan and use this sprayer almost daily for mosquito treatments for clients. Pros: excellent output. Excellent design with quick change fittings for the hoses. Sprays great distances and is predictable. Cons: small mouth for adding water or chemicals. The hoses seals leak even after getting the o-rinfs wet. Should have a wand design similar to a pressure washer with quick change for end pieces. Biggest con of all: The backpack straps... 4 gallons is roughly 32lbs on your back. If you use this every day the straps should be equivalent to that of your commercial backpack blower. Honestly I'm extremely disappointed with the straps. For the money they should be super comfortable. Conclusion: it does what it's supposed to do, but my back and shoulders are telling me to find a new brand unless the straps are majorly upgraded.

4 Stars

Niceee wrote

I never write reviews, but I thought it would be important to review this sprayer because no one has reviewed it yet. I 'm not sure if it was because I was one of the first to purchase it, but I hope this helps someone who is also considering the sprayer but is scared to pull the trigger. [Uses] So I bought this sprayer to replace my aging Chapin unit that barely held pressure and required excessive amounts of hand pumping to get small jobs done. I primarily use backpack sprayers to treat my lawn and apply herbicides, bio-stimulants, and liquid fertilizers. I occasionally use it to apply acaricides as I have high levels of Black Widow spiders in my area. [Impression] This sprayer is very nice as it should be for the price point. I was most impressed by the quality of the application wand with the quick disconnect fittings and the brass sprayer tips. This, along with it being battery-powered, were my main reason for purchasing. I can't stand the cheap plastic parts of the previous sprayers I have purchased over the years. Another thing I liked is that compared to my Chapin, which is also a 4-gallon model, this didn't feel nearly as bulky or cumbersome to put on. I'd compare it to a good quality book-bag for college textbooks where my Chapin felt like wearing the Proton Pack from the first Ghost Busters movie. [First Use] This thing is smooth and quiet, even when I used it on high-pressure mode. It held the pressures perfectly with no noticeable drop-off during my 1.5 hours of continuous use. The pump kept pressures consistent throughout the entire application, making me confident that I was treating my front/rear lawns evenly and accurately. No hiccups at all during my first use. [So why only 4-stars if I'm so happy with this? ] Well, I really wanted to give it a full 5-stars, but I have a small beef...the plastic clip that holds the wand to the backpack while storing is made out of unnecessarily hard plastic, making it challenging to clip the wand rod into it. Does it hold it securely once you get it in? Very much so. Does it make the wand hard to remove, causing you to use excessive amounts of force to remove it, causing it to break the very first time? It did in my case, and I was trying to be careful with it. Now I can't use the clip to store the wand nicely. I would suggest AM Leonard use a more flexible plastic in the future that has more play/forgiveness. I shouldn't have to fight to get the wand out. [Final Thoughts] All in all, to date, I am pleased that I bought this sprayer. If I had to, I would purchase this sprayer again. I do believe it is well crafted and durable. I would recommend it to others. I hope this review helps someone that is on the fence.

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