In this guide we’ll take a look at the best Knapsack Sprayers for the UK market.
I’ve compared spray distance, capacity, functionality and cost
to give you my top recommendations.

What Is The Best Knapsack Sprayer?

  • Features
  • Flexible 3-in-1 rucksack style harness
  • Excellent build quality
  • Best knapsack sprayer for the money
  • Cost
  • Features
  • Large capacity tank
  • Shatter and frost resistant
  • Strong construction
  • Cost
  • Features
  • Lightweight at just 3.65kgs
  • High performance fibreglass construction
  • Telescopic lance
  • Cost
  • Features
  • Fantastic value for money
  • Award winning product
  • Fully adjustable wand nozzle and lockable trigger
  • Cost
  • Features
  • Translucent graduated bottle for accuracy when filling
  • Good value for money
  • Long hose to access difficult to reach areas
  • Cost

More Detailed Knapsack Sprayers Reviews

Hozelock Pressure Sprayer Plus 7 Litre

The Hozelock 7 Litre Pressure Sprayer is sturdy and well built. The tank is easy to fill and made of really thick plastic which is essential considering you will be using it for weed killers or pesticides. The tank is easy to fill, and the translucent plastic has measuring marks making it easy to mix the chemicals to the correct dilutions. Although this is a 7-litre model the maximum recommended fil is 5 litres – still plenty for most small to medium gardens.

The unit is relatively light, and the straps are fully adjustable, making it comfortable for anyone to use. The nozzle has the option of jet or mist sprays and you can lock the flow on to facilitate continuous spraying.

I used this product to clear a bed of nettles in an overgrown part of my garden. I found it light and comfortable to use and the spray was even with no clogging or leaks. The pressure provided by the unit is excellent. I pumped around twenty times and this gave me around 15 minutes of continuous spraying. The lance supplied is a little on the short side, not a problem for me spraying nettles, however, if you were spraying paving you might need to stoop a little. However, a longer lance is available at a reasonable cost, so this still makes this sprayer great value in my opinion.

Overall, this product is effective, sturdy, easy to use and excellent value for money. It is the best knapsack sprayer if you have small to medium areas that require spraying.

Faithfull 16 Litre Knapsack Sprayer

The Faithfull 16 Litre Knapsack Sprayer is an excellent choice for larger gardens.

This is a well built and solidly made unit. All the components are made of tough plastic and look like they will last many years. The product description explains that they are shatter and frost resistant which is good to know.

The design of the sprayer makes it comfortable to use even when the large tank is full. The straps are fully adjustable, and the weight is distributed evenly by the straps and I didn’t find it a strain on my back or shoulders. You might need some help lifting it on to your back if you fill the tank completely, however, I found I could manage to take the knapsack on and off easily with 10 litres of liquid in the tank.

The unit worked well and there was no clogging or leakage. The lance is a good length meaning you don’t have to stoop to spray low growing weeds. The pump action is easy, and the pressure provided is excellent. It has an adjustable nozzle that allows you to change from a fine spray to a good splashing.

This sprayer is the best knapsack sprayer if you have a lot of spraying to do as you can work for about an hour without having to refill. It is also good value for money given its excellent construction.

Matabi Supergreen 12 Litre Knapsack Sprayer

This Matabi Supergreen Knapsack Sprayer has a 12-litre capacity making it suitable for large areas. It is comfortable to use, having padded fully adjustable straps.

The fibreglass lance is 3.2 metres and comes with extensions for different uses. The pressure is also adjustable for different uses and to ensure even distribution. It comes with a nozzle designed for different applications and also a conical and rectangular hood which protects adjacent crops when applying weed killers.

I used this sprayer to clear weeds from my drive and found it to be easy and comfortable to use. It produced an even spray and the length of the lance meant there was no stooping. Considering this is a job that normally leaves me with a backache for several days I was very pleased.

While this model is more expensive than the two previous models it’s a serious bit of kit. If you regularly use a sprayer for a variety of uses, then this could be the right product for you.

Spear & Jackson Pump Action Pressure Sprayer 5 Litre

The Spear & Jackson Pump Action Pressure Sprayer has a 5-litre capacity. The sturdy, translucent bottle makes it easy to mix and fill and the shoulder strap makes it easy to carry. The product features a lockable trigger for continuous spraying and the nozzle is adjustable between a fine mist and a single jet. Pumping the unit to create pressure is simple and easy and the spray provided is even.

The shoulder strap is not quite as comfortable as the backpack style products: I found that the unit bumped around a bit on my hip when in use. The lance is also a little on the short side. However, this is a well-built product that looks likely to offer years of use and it comes at a very reasonable price.

This sprayer is excellent value for money, it does the job well with no leaks and would be perfect for occasional, light use. In my opinion it’s the best knapsack sprayer on a budget!

VOXON 5 Litre Pump Action Garden Knapsack Sprayer

This VOXON 5 Litre Pump Action Garden Knapsack Sprayer also has a 5-litre capacity and features a lockable trigger mechanism and an adjustable nozzle that offers a range of settings from a fine mist to a spray.

As with the previous products the translucent tank is sturdy and well made and makes it easy to measure chemicals and to fill. The pump is easy to use, and the unit provides an even spray.

This is another good value product suitable for the smaller garden and light use.

Knapsack Sprayer Buying Guide

There are several things to consider when choosing the best knapsack sprayer for use in your garden.

Firstly, you will want to make sure it is durable and serviceable. Ensure that the tank is made of thick hard-wearing plastic and that the fittings, hose, lance and seals are durable. You really don’t want harsh chemicals to be leaking on you or your garden! In addition, if you plan on using your sprayer for many years, you should check that spare parts are available. This will save you money in the long run as you won’t have to buy a whole new unit.

The size of sprayer you choose will depend on your needs, of course. If you only have a small area to spray, a 5-litre tank will likely be the best knapsack sprayer for your needs. However, if you have a large area, such as a sizeable driveway or patio to spray then you may find it a nuisance to keep having to stop to refill a smaller tank. Bear in mind that while a larger tank will save time and fuss with refilling, it will make the unit considerably heavier to carry when full.

Comfort in use is another consideration when choosing the best knapsack sprayer. Backpack style straps are usually more comfortable than shoulder straps if you are going to be using the unit for any length of time. Look for adjustable and padded straps. Ergonomically designed pump handles and triggers also reduce the strain. A trigger that can be locked on is essential if you are not going to end up with aching hands and blisters.

Lastly, check that the length of the hose and lance are suitable for your needs. A longer lance will mean less stretching or stooping. The nozzle should also be adjustable, so you can choose the right setting for your requirements.


How can I make sure I extend the life of my knapsack sprayer as long as possible?

To ensure you get the best out of your sprayer you should clean it thoroughly after every use to remove potentially corrosive chemicals from the tank, hose and lance. You can buy special pump cleaners or flush the unit through with clean water. In addition, you should store your unit in a dry, frost free location. Lubricating joints and seals can help to prevent them from drying out and cracking. Always remember to check for leaks before filling your sprayer with chemicals.

When is the best time to use my sprayer?

It is best to spray weeds on a dry day when no rain is forecast as rain can wash the weed killer away before it has a chance to work. You should also choose a day that is not windy to avoid the weed killer being blown onto adjacent areas and damaging other plants.

Can I use the same sprayer for weed killers and pesticides?

It is not recommended that you use the same sprayer for both pesticides and weed killers. This is because, even with thorough cleaning, your sprayer may contain traces of weed killer that could harm your plants. To be on the safe side, keep a specific sprayer for weed killer and don’t use it for anything else.