Large Capacity Backpack Sprayer

RS18 Large Capacity Backpack Sprayer

RS18 Backpack Sprayer – Built for Comfort, Capacity & Performance

The RS18 Backpack Sprayer is one of our most popular models - and for good reason. With its 18-litre capacity, solid construction, and user-friendly design, it offers outstanding value and performance. We believe more users could benefit from its thoughtful features, so here's a detailed look at what makes the RS18 a top pick.


First Impressions Matter

Right out of the box, the RS18 impresses. The packaging is vibrant, sturdy, and filled with high-quality photos and information. Inside, you'll find a comprehensive 125-page instruction manual, including 8 pages in English. It covers everything from safety advice and assembly instructions to maintenance tips and troubleshooting - everything you need to get started and keep going.


Easy Assembly, Right from the Start

Assembly is refreshingly straightforward. With the shoulder straps already attached, you’ll only need to fit five components. A small bag inside the tank contains essential fittings—don’t miss it!

  1. Attach the hose to the tank and trigger handle (remember the locking threads).

  2. Fit the metal lance to the handle.

  3. Install the pump lever, which can be mounted on either side for left or right-handed use. It features an adjustable extension with three length settings and three width settings for operator comfort.

Everything slots into place easily - though we recommend doing this in good lighting, as aligning the locking pin can be fiddly in the dark.


Built to Last

The 1.5-metre hose is durable and feels more robust than many others on the market. The white polypropylene tank is solid and well-balanced, and the sprayer overall gives the impression of a well-engineered, professional-grade tool.

Filling the tank is simple, thanks to the wide 140mm neck and bright yellow lid. A removable plastic filter in the neck prevents debris from entering the tank and potentially blocking the nozzle - handy, and highly recommended to leave in place.


Comfort on the Job

The padded shoulder straps make wearing the RS18 comfortable even when full. Just be sure to clip them into the base of the tank before putting it on. With plenty of strap adjustment available, the RS18 suits a wide range of body types and sizes.


Spraying Made Simple

Once assembled and filled, a few pumps of the lever will pressurize the system. A pressure gauge on the trigger handle shows real-time pressure build-up - an excellent feature that ensures you're operating safely and efficiently. The RS18 offers up to 6 BAR maximum pressure and a flow rate of 1.4 litres per minute - ideal for larger spraying tasks.


If you're looking for a reliable, high-capacity backpack sprayer that’s easy to assemble, comfortable to use, and built to perform, the RS18 is a fantastic choice.

For more technical specifications, visit our RS18 product page. If you have any questions, don’t hesitate to reach out via our Contact Us page or give us a call—we’re happy to help.


For a more visual explanation of our large capacity backpack sprayer, we have made a comprehensive unboxing and assembling video of the RS18's little sibling, the RS125. The frame and accessories of the sprayer remain the same, with different filling capacity:


    • Related Articles

    • What is the best backpack sprayer for weed killer?

      The best backpack sprayer for weed killer depends on how much you need to spray and how often. For smaller jobs - covering up to 100 square metres and occasional use, the IK12 knapsack sprayer is an excellent choice. It’s affordable, well-built, and ...
    • The Groundskeeper Sprayer: Sprayers for Professional Results

      As a professional groundskeeper, having access to reliable, high-performance sprayers isn’t just a convenience - it’s essential. Whether you’re tackling weed control, fertilising, or treating turf, the ability to spray efficiently, accurately, and ...
    • Review of RS125 Mesto Knapsack Sprayer

      If you're looking for a reliable, easy-to-use knapsack sprayer with professional-grade features in a compact design, the Mesto RS125 is an excellent choice. With a 12-litre tank, robust construction, and 6 BAR maximum pressure, it delivers consistent ...
    • Repair or Replace Your Sprayer? Here’s Why Repairing Is the Smarter Choice

      When your sprayer starts to falter, your first instinct might be to toss it and purchase a brand new one. But before you reach for your wallet, consider this: repairing your sprayer could be the better, smarter, and more eco-conscious decision. In ...
    • Are Electric Sprayers Good?

      Yes, electric sprayers can be very good, but that doesn't mean all electric sprayers are created equal. Just like with any tool, quality varies, and you often get what you pay for. The best electric sprayers are built using durable materials, ...