The Ortho Manual Pump Backpack Sprayers does the work of both a piston and diaphragm backpack sprayer. The exclusive internal No Leak Pump keeps your back and clothing dry. The paddles keep liquids, powders and water-soluble solutions mixed, in solution and ready to spray. Also the pump features Viton seals that can be easily changed within minutes without tools (up to 7x faster than the leading competitor). The premium shut-off offers a comfort grip, lockable trigger to prevent hand fatigue and a removable in-line filter to reduce clogging. The Ortho Backpack Sprayer is capable of spraying up to 150 PSI for those hard-to-reach areas. The foldable pump handle reverses for left- or right-handed use and the tank has a built-in carry handle with wand storage. With adjustable padded straps, waist belt and chest cinch strap, the backpack ensures comfort while you work. Multiple nozzles are included for ultimate versatility: Brass adjustable nozzle (enables stream to cone patterns), wide flat fan nozzle (red, 0.25 GPM, angled at 70degrees) and a narrow flat fan nozzle (yellow, 0.15 GPM, angled at 30 degrees).