The commercial-duty Chapin Dual Action Backpack Sprayer combines piston and diaphragm technology to provide pressure from 25 to 90 PSI and virtually eliminate piston leaks. It sprays liquids and wettable powders. The self-cleaning JetClean design keeps the 3D removable filter from clogging up with residue and debris. 6in. mouth opening for easy filling. Includes multiple nozzles for various spray patterns and volumes. 3-stage filtration system: strainer basket, filter in piston cylinder, and filter in shut-off 6in. mouth opening for easy filling and access to internal components Dual displacement pump piston and diaphragm pump configuration virtually eliminates leaking from the pump In-tank removable filter catches anything that gets by the strainer basket when filling and attaches to the inlet filter at the piston JetClean self-cleaning sends a powerful burst of fluid through the filter with every downstroke of the pump handle to prevent it from clogging with debris Includes multiple nozzles for various spray patterns and volumes Durable chemical-resistant seals Model Number: 63900. Age Group: adult.