A knapsack sprayer is one of the best investments you can have for your garden. Don’t be intimidated by it. This product is no longer just for commercial use. You can have one for your garden, no matter what size it is
Here is our list of the best knapsack sprayers on the market.
Best Knapsack Sprayer 2022 – At A Glance List
Gallons / Weight
#1 Field King Max Backpack Sprayer for Professionals >>> BEST FOR: ♦ Best Buy ♦
This product is also known as a backpack sprayer. It is an apparatus that allows you to spray water and herbicides, sometimes fungicides and insecticides, on your plants with efficiency.
It consists of a tank-like item, which you then put on your back like a knapsack or backpack, hence, the name. There is also a spray nozzle that would simplify the application process.
The purpose of the product is so you can pump all these important liquids into your garden at a fast pace.
You can get the job done fast, leaving you more time to do other things.
The knapsack sprayer was used for large agricultural lands and commercial farms.
Today, backpack sprayers come in different forms and sizes to cater to those who need them for backyard gardening.
As popularity rose
The designs for the knapsack sprayer have also been upgraded. Some products come with a water gauge, so you will know when it’s time to refill the tank.
There are also different nozzles to choose from so that you can choose the right type of spray for your garden or for a specific type of plant.
These products were pretty standard. They were also really expensive, which was why only companies and large farms would invest in them.
Not only that, they were not mass produced. They were actually difficult to get hold of.
It was a good thing
Manufacturers eventually realized that knapsack sprayers could also be very helpful in backyard gardening.
Now, they are widely available for home use.
What Do Knapsack Sprayers Do?
The role of the knapsack sprayer is to simplify the water and other liquid delivery to the garden.
In a way, you are doing the liquid application in a professional manner, without spending money on professional services. This product could easily save you money.
It will save you time since the product allows you to do things fast. It will also allow you to save your energy since it simplifies the task.
You can put various things on the knapsack sprayer–anything that your garden may need. Among these things are the following:
Weed killer / herbicide
Here’s the goal
There should be even distribution of water and chemicals into the plants or into the garden. That’s the technical advantage of having a knapsack sprayer.
It has to be calibrated though.
There are three major components of the knapsack sprayer:
This is where you put your liquid. The bigger it is, the more types of liquids you can put in it. However, you also have to consider the person who will wear the knapsack sprayer when it comes to choosing the size of the tank.
This is where the liquid will pass through. At the end of it, you can add the nozzle. There are different kinds of nozzle and you can choose the one best suited for your garden. The hose simplifies the process. It will be easier for you to distribute the liquid.
It won’t be called a knapsack if it doesn’t have the straps. This will allow you to keep the tank on your back. It will be easier to move around the garden that way. More importantly, the straps make sure the tank will be secured to prevent accidents.
What Makes a Good Knapsack Sprayer?
A knapsack sprayer will make it easier for you to distribute water and herbicides and other chemicals evenly to all plants in the garden.
However, knapsack sprayers are not created equal. Some are great, some are just good, and there are also those that shouldn’t be on the market.
Here are the important things you should consider when buying a knapsack sprayer:
Type / power source
There are two types of knapsack sprayer: manual and motorized.
The sprayer works by pumping the equipment to create pressure so that the liquid will travel through the hose and will then be ejected through the nozzle. It could be pumped manually or through a motorized system.
The motorized sprayer is so much easier to use. But it’s also more expensive. So, should you pay more for convenience? That’s really up to you!
Most of the motorized sprayer work with a battery. This means that it has to be charged before use.
That’s another thing!
You also have to look at the power of the battery. If you just have a small garden, then you don’t need a powerful one. And it follows that you will need a more powerful pack for a larger garden.
There are also two types of pump: piston pump sprayer and diaphragm pump sprayer.
Of the two, the latter is more durable. It’s also a bit pricier. However, the investment would be worth it if you have to deal with herbicides or harsh chemicals regularly.
Since you’re dealing with potentially harmful chemicals, you have to make sure that the tank material is durable and safe.
How much liquid can the tank handle? While it’s true that the tank with a larger capacity should be better because it can carry more liquid, you also have to consider the size of your garden and your ability to carry the weight on your back.
This will be around you, so it should be made of comfortable material. Other than that, you also want it to be durable since it will be carrying weight. The straps should be adjustable so anyone can help out in the garden.
Speaking of weight, you have to make sure that the entire product is not heavier than you. You have to lug the backpack sprayer for some time, so you should find the appropriate weight for you.
Don’t go directly for the heavier set thinking that it will carry more liquid and is made of better-quality material. You should look at the overall setting of the product and check if it’s the right one for you.
Hose & wand
The water passes through the hose and the wand from the tank. It goes out of the nozzle that is attached at the end of the wand. The wand is stiff so that you can spray properly. You have to look at the material and length when looking at the hose and wand components.
Since you will be using your hands for spraying, find a knapsack sprayer with a good handle. It should be comfortable to grip.
There are different kinds of nozzles. Look for the type of spray that you think will be good for your type of plants and type of liquid.
Some of the chemicals that you will put in the knapsack sprayer are harsh and corrosive. Make sure all the materials of the sprayer are herbicide-rated.
This means that the products are made specifically for herbicide use and other similar substances.
To know more about the knapsack sprayer, check this out:
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Nozzle/s: show head, 2-in-1 mist to stream, double-head mist, single-head mist
Dimensions: 20.9” x 15.1” x 9.2”
Weight: 15.07 lbs
If you don’t want to tire your hands from pumping, then you ought to buy a battery-powered sprayer. The PetraTools Battery-Powered Backpack Sprayer is definitely a great choice.
Take a look at its many advantages:
The tank capacity is four gallons but you can actually do 200 gallons in one charging. That’s because a fully charged 8 Ah lead-acid battery could allow you to do six to eight hours of spraying without stopping.
You don’t need to do a single pump in those hours. It works on 70 PSI and it comes with an adjustable pressure knob.
The handle has a plastic squeeze for spraying with a locking mechanism.
The product also has a wide mouth. This will make you fill the tank with ease. It also allows you to clean the tank easily.
Worried about debris?
Don’t be! There’s a screen filter that would prevent debris from getting into the tank when you fill it up with your liquid–whether you are using herbicides, fertilizers, and even pesticides.
This also works with power and other water-soluble solutions.
The tank also has gallon markings so you will have a guide on how much solution you are using. It’s very helpful when mixing different products.
Here’s the best part:
The set comes with six nozzles. That would give you a lot of versatility. The nozzles are shower head, 2-in-1 mist to stream, double-head mist, and single-head mist.
The pressure adjuster can also help you adjust the spray that comes out of the nozzle.
The shoulder straps are extra padded for comfort.
But but but
The hose connection doesn’t seem so sturdy. It doesn’t look like it would last for years.
Also, the wand hook gets loose after some time.
To make matters worse, the assembly instructions weren’t that great.
If you want something convenient where you don’t have to pump multiple times before the sprayer works, then this is definitely the product for you. You can even spend the entire day spraying as the battery on this thing can last six to eight hours.
The VIVOSUN Garden Pump Pressure Sprayer is great for small gardens. It’s also ideal for women and senior citizens because it’s really light at just 3.04 pounds.
It’s light because the tank capacity is only 1.3 gallons. It’s only really for small gardens.
This is also ideal for indoor use. It’s practical if you have indoor plants, but this can also be used to spray some cleaning solutions inside your home.
There is a large mouth, so you could easily put in the liquid or any of the substances you need to use. It would be easy to fill without spilling.
There are also calibrations on the side, which will give you an idea how much liquid you are putting in. This is extremely helpful when you are mixing substances like powder-like herbicide or fertilizer and other solutions.
This may be a small sprayer but it has a long wand. It’s over 22 inches, which makes it easy to use for hard-to-reach areas.
The tank also has a thickened bottom for durability. This means that if you’re tired of carrying the tank, even if it’s not that heavy in the first place, you can put it down on the ground with much worry.
Yep! There is a clasp at the side where you can put the wand. It allows you to store the product easily.
There are some misses
For one, after using it for quite some time, the valve near the sprayer starts leaking. That’s never good.
Putting it all together was also an issue. There were no clear instructions for assembly.
This is a versatile backpack sprayer that you can use for indoor and outdoor spraying. It’s small and it’s light, which is ideal for small gardens and other spraying activities like cleaning and disinfecting.
It’s nice when the knapsack sprayer works with fewer pumps. It gives your hand some respite. That’s the Field King Backpack Sprayer for you.
Let’s take a look at the details
It has a four-gallon capacity, which is really quite large for home garden use.
The internal piston pump delivers up to 150 PSI. The design is supposed to make sure that there will be no leaks.
It comes with Viton seals and a lockable shutoff. But was it truly effective? More on that later.
Back to the specs. It has a 21-inch wand made of durable polypropylene. That’s a good length to apply liquid to hard-to-reach areas.
It comes with an in-line filter. This way, you don’t have to worry about debris getting into the tank when you are refilling.
What’s also interesting is that it can do the work of both the piston pump and diaphragm pump.
You can also easily change the seals without tools because of the pumps that are accessible.
There are four nozzles, too. These are the brass adjustable, two flat fans, and a foaming nozzle. Even better, it is compatible with TeeJet nozzles.
So, what can it handle?
You can put any type of chemicals for plants like herbicides and fungicides, and others. You can also put powders or other water-soluble solutions.
The internal paddles will keep them mixed. These paddles are activated through pumping.
It’s also great that the handle can be reversed so that it can be comfortably used whether you are right-handed or left-handed.
It’s not perfect, of course!
While the top part doesn’t leak, thanks to the Viton seals, it’s the hose part that’s a problem. It’s the part where the hose connects to the pump.
Unfortunately, leaking is such a big deal since we are dealing with chemicals here. So, you have to watch out for this part every time you use it.
Then here’s a reminder:
Don’t ever leave the wand under the heat of the sun. It’s so flimsy it will start to show some cracks and chipping.
The thing is
When it comes to a manual knapsack sprayer, you have to expect that your hand will do a lot of work. At least, with this Field King, you don’t have to pump as many times as other sprayers just to start pressurizing. This is a good product for your hand.
MY RATING: 90%
Easy to pressurize
Comes with 21-inch wand
Features in-line filter
Can do the work of both piston and diaphragm pump
You can easily change the seals
Comes with 4 nozzles and will accept other nozzles
Internal paddles come in handy when mixing solutions and powders
Handle is versatile, can be for left-handed or right-handed people
At just 9.2 pounds, the CHAPIN Backpack Sprayer is quite light, considering that the tank has a capacity of four gallons.
That makes it ideal for women and senior citizens.
Here’s the deal
The product is ideal for all kinds of fertilizers, weed killers, and pesticides.
It has a wide mouth, around four inches. That makes it easier for you to pour liquid into the tank. They won’t spill so much or at all.
In the same manner
It would be easy for you to clean the tank.
The product also has a three-tank filtration system. This is so debris will not penetrate the tank when you pour in your plant solutions.
The filters are also easy to clean.
There is an adjustable brass spray nozzle that could provide a 23-foot horizontal stream and 25-foot vertical stream.
It also comes with a 20-inch wand, which is complemented with a long hose. The PSI is between 40 and 60.
The straps are padded so you could carry the tank comfortably for hours.
It’s easy to put together. That’s always a good thing as you won’t have to waste your time.
It’s also really easy to pump. It’s quite good for your working hand.
The sprayer tip is quite flimsy. The brand could really do better than what it provides.
Also, as time goes back, the nozzle area will start to leak.
That’s a no-no!
You never want any type of leak when it comes to substances that could be harmful.
And while the straps are quite comfortable, they were not made with durability in mind. If you keep lugging the full four gallons in the tank, chances are the straps might not survive.
If you don’t think you have the energy to lug around a heavy backpack sprayer, this is a better product than most when it comes to weight. It’s lighter than most of its counterparts, which means you can reserve most of your energy for actual work.
A knapsack sprayer will make it easy for you to spray fertilizers, herbicides, and fungicides in your garden. It can also be used in spraying pesticides. The wand allows you to expand your spraying capacity.
Find the best knapsack sprayer to make your work even easier. Here is a rundown of some of the best sprayers that made it into our list.
Best Knapsack Sprayer for Precision
Wouldn’t it be great if you can spray just the right amount of solution to your plants? Whether we are talking about fertilizer or herbicides. Sometimes, too little or too much could be bad for the plants. The Field King Max Backpack Sprayer is fantastic for precision.
Best No-Leak Knapsack Sprayer
A sprayer that leaks is quite annoying. It could be dangerous, too, depending on the chemical you are handling. The CHAPIN Backpack Sprayer is excellently made to keep everything tightly sealed inside the tank.
Best Knapsack Sprayer for Hard-to-Reach Areas
With a 20-inch wand complemented by a 48-inch hose that stiffens with pressure, the SOLO Backpack Sprayer can help you spray at areas that are generally hard to work on.
Best Knapsack Sprayer for Small Gardens
The VIVOSUN Garden Pump Pressure Sprayer is ideal for small gardens. With a capacity of just 1.3 gallons, it’s light and it’s great for just any small spraying activities. You can even use it indoors.