The Cooper Pegler CP3 is a 20-litre knapsack sprayer and the larger-capacity option in the Cooper Pegler range. Its diaphragm pump system is resistant to dirty water and requires no lubrication, with brass components avoiding premature pump wear over years of use. Comes complete with a yellow hollow cone nozzle and green anvil nozzle, plus a pressure relief valve for precise application control. The CP3 has long been a market-leading knapsack sprayer for agricultural and horticultural use. Best For Spraying herbicides & weed killers Applying fungicides & insecticides Larger areas & fewer refills Horticultural & agricultural use Why the CP3 ✓ 20-litre capacity - fewer refills on larger jobs The largest tank in the standard Cooper Pegler knapsack range, the CP3 covers more ground per fill - useful when working larger areas where stopping to refill is disruptive. ✓ Diaphragm pump resistant to dirty water The friction-free diaphragm pump avoids premature wear even when working with less than clean water - a common cause of failure in cheaper piston pumps. No lubrication required. ✓ Brass components for excellent durability Key pump components are made from brass rather than cheaper plastics, resisting wear and corrosion over years of regular use. ✓ Two nozzles included for different applications The yellow hollow cone nozzle gives a fine, light droplet pattern suited to insecticides and fungicides. The green anvil nozzle produces a wider, heavier droplet pattern that reduces drift - better suited to herbicides. CP3 or CP15? CP15 Compact CP3 Larger Capacity 15L 20L Pump type Diaphragm Diaphragm Max pressure 3 bar 3 bar Brass components ✓ ✓ Weight (empty) 4.6kg 5.1kg Nozzles included Cone + anvil Cone + anvil Best for Lighter jobs, less weight to carry Larger jobs, more capacity per fill What's in the Box Cooper Pegler CP3 sprayer - 20L tank Yellow hollow cone nozzle - fine droplets for insecticides & fungicides Green anvil nozzle - wide pattern, drift-reducing for herbicides Adjustable shoulder straps with padding Common Questions Which nozzle should I use for weed killer? The green anvil nozzle is recommended for herbicides - it produces a wider, heavier droplet pattern that reduces drift and minimises the risk of damage to nearby plants. Can I switch the pump lever to the other side? Yes - the lever is adjustable and reinforced for left or right-hand operation. Should I get the CP3 or the CP15? Both share the same pump technology and nozzle set. The CP3's 20L tank covers more ground per fill - useful for bigger jobs. The CP15 is lighter to carry at 4.6kg empty if you're working smaller areas or prefer less weight on your back. Specifications: Tank capacity 20 litres (22-25L actual) Tank material Polypropylene / polyethylene Pump type Diaphragm, brass components Max working pressure 3 bar Delivery hose length 1140-1280mm Weight (empty) 5.1 kg Weight (full) 24.5 kg
