The SW503 heavy-duty 15 litre knapsack sprayer features a dual piston/diaphragm pump, providing the benefit of achieving high pressure if required with the piston (over 6 bar), and the safety of a diaphragm pump as well.

Fitted with Viton seals, this sprayer will last. Other features include a wide filling port, filling strainer and pressure filtration, lance and adjustable nozzle for durability.