Solo 425 4-Gallon Professional Piston Backpack Sprayer, Wide Pressure Range up to 90 psi Easily and effectively handles liquid disinfectants, fertilizers, herbicides, pesticides and formulations for tree, shrub and plant protection. High-performance piston pump for increased pressure capabilities of up to 90 psi and commercial shut-off valve with lock-on/lock-off feature to minimize use fatigue. Viton seals in key locations ensure long service and durability. Interchangeable pump handle for left or right-hand operation and 48 nylon-reinforced high-pressure hose for extended reach. Four-nozzle assortment for multiple spraying tasks: adjustable, fan spray, hollow cone, and jet stream nozzles. TeeJet compatible.