Best Knapsack Sprayer Reviews UK

Best Knapsack Sprayer Reviews UK

A good quality knapsack sprayer will allow for easy maintenance throughout the garden. Used to spray pesticides, herbicides, and fungicides, knapsack sprayers allow you to remove any unwanted weeds and pests to keep your garden looking its best.

In fact, knapsack sprayers are so effective that they are used by various professionals, from gardeners to landscapers to council workers. Anyone that needs to control weeds or protect plants will certainly benefit from a good knapsack sprayer!

Yet with such a wide selection of products to choose from, choosing the best knapsack sprayer for your garden is often easier said than done. After all, you want to avoid buying something cheap that will eventually stop working, but at the same time avoid spending too much on a sprayer that you won’t use that often.

Here’s some tips for finding a great knapsack sprayer that meets all your needs:

Types of Knapsack Sprayer 

While there is an abundance of choice when it comes to knapsack sprayer products, most of these fall into two distinct categories – diaphragm and piston sprayers. Both provide wide area coverage offering enough control to prevent unwanted areas being sprayed.

Piston sprayers use pump action to provide the pressure need to apply the spray from the knapsack, usually done using an upwards and downwards motion. This allows the liquid solution in the backpack to be applied in a spray over the desired area, with some producing pressure in the 90psi region.

Similarly, diaphragm sprayers utilise a pump action to apply the liquid as a spray, but they are usually designed to be much more durable. Materials for these sprayers are usually high quality to prevent chemical damage, making them more suitable for stronger pesticides that may damage a piston sprayer.

Things to Look for in a Knapsack Sprayer 

There are quite a few things to look for in a knapsack sprayer, including:


You’ll want a knapsack sprayer that’s built to last, especially if using strong chemical solutions. Diaphragm sprayers are ideal for this but will cost more, but you may not need this if you’re only using mild solutions in the garden.

Also, think about how often you need to use it. For regular, large-scale gardening, you may need a strong sprayer that can handle frequent use, but if you’re only using it sparingly then it won’t be as much of an issue.


It’s always a good idea to get a knapsack sprayer that is easy to maintain. Both the tank and lance need to be cleaned frequently, so you want something that allows you to do this with relative ease, otherwise maintaining it becomes more of a nuisance.

Those using harsher chemicals should be cleaning their sprayer more frequently to prevent corrosion and blockages, so be sure to check out easily the can be cleaned. Many can be cleaned using water, while others may require a specific cleaning solution.

Tank Durability

The tank of a knapsack sprayer should always be durable. As it is exposed to various chemicals and solutions, it’s important that the tank can withstand them without the risk of wearing down and breaking.

Durable plastics such as polyethylene are recommended, and it doesn’t hurt if the tank is treated with a UV protector to ensure longevity.


A knapsack sprayer is a great tool for garden maintenance – but only if it’s easy to use!

Be sure to select a backpack that you can comfortable wear without straining your back or shoulders, as you don’t want to risk injuring yourself! Look for comfortable straps and a lance that won’t leak and risk chemicals contacting your skin.

The sprayer should be easy to use without tiring you, otherwise there’s no point in buying it. They are supposed to make garden maintenance easier not harder!  

The Best Knapsack Sprayers Currently Available

Interested in buying a quality knapsack sprayer? Check out some of the best products currently available:

Cooper Pegler classic knapsack sprayers (CP15 (15lt)

  • Diaphragm pump system
  • Durable yet lightweight design
  • Pressure limiter allows for adjusted pressure settings
  • Double filtration system prevents impurities reaching the nozzle 
Cooper Pegler classic knapsack sprayer UK

The Cooper Pegler CP 15 is a robust knapsack sprayer suitable for all types of garden maintenance, crop control, and weed removal. Sporting a diaphragm pump system, the sprayer is fully protected from even the harshest chemicals thanks to the tank skirt, allowing any solution to be used without damaging the system.

While this makes it suitable for the harder spraying tasks around the garden, the inclusion of a pressure limiter allows you to easily adjust the pressure settings to perform any lighter spraying tasks.

For instance, low-pressure setting is ideal for using herbicides, while the high-pressure setting allow various pesticides and fungicides to be applied as needed. Simply flick to the any of the pre-settings and you will get the pressure you need.

A double filtration system ensures that any solution is properly filtered before reaching the nozzle outlet, helping to clean out any impurities.

Better still, the entire lance is built to last. Made from glassfibre reinforced plastic, any solution will pass through without damaging the lance. It can also be used with any type of nozzle attachment, and there are two included for different types of sprays – you can also buy different types if needed.

Using the CP 15 is generally very easy. For example, pouring in your solution is made easy thanks to the wide opening and there is a measuring jug included for mixing, while it can operate in both the left and right hand as necessary.

The shoulder straps are padded to avoid strains and a carry handle make transporting the sprayer simple enough. Because of the diaphragm pump system, pumping is takes very little effort, making the CP 15 one of the easier knapsack sprayers to operate over large areas.


Matabi Supergreen 16 Knapsack Sprayer 16 Litre

  • Adjustable nozzle and pressure regulator
  • Decompression and safety release valves
  • 16L capacity
Matabi Supergreen 16 Knapsack Sprayer

The Matabi Supergreen 16 is a 16-litre knapsack sprayer with a host of features that make it a great choice for professional or domestic use.

Perhaps the most noteworthy feature of this sprayer is the pressure regulator. Not common among sprayers in this price range, it allows for easy pressure changes to suit your solution. For instance, 1.5 bar pressure is ideal for herbicide application, while 3 bar pressure suits pesticides and fungicides better.

This allows for even applications for any solution you need to use, allowing for the best possible results when performing maintenance in your garden or allotment. With a 16-litre capacity, you can certainly expect to get a lot of work done without much hassle!

In fact, the Matabi Supergreen 16 couldn’t be easier to use. Features such as adjustable padded straps make it suitable for people of varying heights and builds, while also making it much more comfortable to wear for long periods. The tank itself is lightweight, so it shouldn’t be too strenuous even when full.

The sprayer is also great to use for the more difficult to reach spots. With a .8m lance and 1.3m hose, applying sprays to high areas couldn’t be easier. Also, there’s a host of adjustable lance accessories available should you need something with more range, although these are sold separately.

A measuring jug and set of additional nozzles are also included, so you can easily add solutions and get the desired type of spray you need. The standard nozzle is suitable for most types of sprays however, especially with the inclusion of the pressure regulator, although the conical and rectangular shapes offer decent protection for nearby crops and plants.

One of the few setbacks of the Matabi Supergreen 16 is that it does require frequent pumping for the necessary pressure. While this may not be an issue for some, others may feel strain of repetitive pumping.


Oregon 518771 Backpack Sprayer

  • Massive 20-litre capacity
  • 0.9-litre pressurised chamber capacity
  • Non-pressurised tank
  • Lance comes with 2 adjustable spray nozzles
Oregon 518771 backpack spayer

For anyone seeking a reliable knapsack sprayer with a massive capacity to cover large areas, look no further than the Oregon 518771 Backpack Sprayer.

The 20-litre capacity ensures you can treat even the largest garden spaces with a single tank, removing the need to frequently mix a solution and refill the tank when applying to large areas in the garden.

However, this does make the sprayer on the heavier side when full, so some people will likely struggle to wear it for prolonged periods. The straps are adjustable to help in this regard, but it’s worth remembering that it may feel too strenuous for some – this is less of an issue in smaller gardens however.

As a non-pressure tank type, there is a sperate pressurised chamber that holds around 0.9-litres of solution. This means you only need to pump a few times every 30 seconds or so, which is certainly better than systems that require constant pumping for pressure.

The maximum working pressure for the sprayer is 0.2 – 0.3mpa, which roughly translates to 29 -43.4psi of pressure. This makes it suitable for low-pressure herbicides and the high-pressure fungicides and pesticides too. Thanks to the changeable nozzles, you can easily get the desired type of spray you need.

For instance, the fan nozzle offers a very impressive coverage area, making it great for wide applications of weed killer, while the spray nozzle offers a more controlled spray for pesticides and the like.

This is certainly one of the best knapsack sprayers for garden maintenance, especially given the large capacity and interchangeable nozzles. There’s enough pressure to apply most types of solutions, while the reasonable price makes the Oregon 518771 Backpack Sprayer worth consideration.


Last update on 2022-02-21 / Affiliate links / Images from Amazon Product Advertising API