The 20L Manual High-Pressure Knapsack Sprayer is the flagship manual sprayer in the Agronest Equipment range, purpose-built for professional agricultural, horticultural, and pest control applications. With a full 20 litre heavy-duty tank, this sprayer covers significantly more ground between refills than smaller models, saving valuable time during large-scale spraying operations. The high-pressure manual piston pump builds pressure quickly and maintains it consistently throughout each spraying cycle, delivering reliable output from the first spray to the last drop. A stainless steel spray lance resists corrosion from chemical exposure, and the included set of three interchangeable nozzles — cone, fan, and adjustable — gives you the versatility to handle everything from broad herbicide application to precise spot treatments. Reinforced padded shoulder straps and an ergonomic back panel keep you comfortable even when carrying a full 20-kilogram load across rough terrain. Chemical-resistant seals and gaskets ensure long-term durability and prevent leaks that waste expensive products. This is the sprayer professionals choose when they need dependable, high-volume manual spraying performance day after day.
Available Conditions
Key Features
Specifications
Common Uses
Why Choose This Product
When coverage area matters and refill downtime costs you productivity, the 20L Manual Knapsack Sprayer from Agronest Equipment is the clear professional choice. The extra four litres over a 16L model means fewer trips to refill, and the stainless steel lance outlasts cheaper aluminium or plastic alternatives by years. Every unit leaves our warehouse fully assembled and pressure-tested, so it is ready to work the moment it arrives. Agronest Equipment backs this sprayer with comprehensive parts availability and responsive customer support.
Get Your Free Quote Today
Tips & Care Instructions
Who Is This Product For?
The 20L Manual High-Pressure Knapsack Sprayer is the professional standard for farmers, estate managers, grounds maintenance contractors, and pest control operators who need maximum capacity and durability from a manual spraying solution.
Frequently Asked Questions
When filled to its 20 litre capacity, the total weight including the sprayer body is approximately 24.2 kg. The padded shoulder straps with chest buckle distribute this weight evenly across your back and shoulders for comfortable extended use.
The 20L manual knapsack sprayer ships with three interchangeable nozzles: a cone nozzle for targeted application, a fan nozzle for wide-area coverage, and an adjustable nozzle that lets you dial between fine mist and direct stream patterns.
Yes, the 20L sprayer handles wettable powder solutions effectively. However, we recommend agitating the tank periodically during use to keep the mixture consistent, and cleaning the filter screen after each session to prevent clogging.
Approximately 10–15 pumps of the piston handle will bring the tank to full working pressure. The pump mechanism is designed to be smooth and efficient, minimising arm fatigue during repeated pressurisation.
Yes. Agronest Equipment stocks replacement stainless steel lances, nozzle sets, hoses, pump kits, seals, and all other wearing parts for the 20L manual knapsack sprayer.
With the 56 cm stainless steel lance at full pressure, this sprayer can reach approximately 4–5 metres vertically, making it suitable for spraying fruit trees, tall hedges, and elevated crop canopies.
Delivery & Shipping
We offer nationwide delivery for all containers. Delivery costs are calculated based on your location and container size. Free delivery is available on orders over $5,000. Contact us for a delivery quote.