Our top of the line for lawn painging! The Farm and Home 528 Piston sprayer is designed for your comfort, ease of use, and long life. The Piston is an external pump and is capable of generating 120 psi of pressure. The pump handle is designed to fit the angle of your wrist to provide comfort and reduce fatigue. This sprayer is a four gallon sprayer that is capable of handling most jobs. The spray gun is fully serviceable and does not require any tools. The unit is fitted with Viton seals for extended life. A Necessity for Every Home! This is not a "throw-away" sprayer, but a versatilve home tool that will provide years of service in home and garden projects ranging from lawn painging, grass paint, sealing and cleaning decks, fences, shake roofs, aluminum siding, concrete, brick, and stone, to wallpaper removal, carpet cleaning, waterproofing and fabric treatments, as well as applying fertilizers, herbicides, insecticides, oil-based sealers, diesel, pesticides, and other liquid solutions. High Pressure External Piston Specifications: Type: Backpack Working Capacity: 4 Gallons Maximum Pressure: 120 psi Working Pressure: 15-80 psi Seals/ O-Rings: Viton/Nytril Shipping Weight: 13 lbs Pump Type: External Piston Patented Pump: No Repairable Pump: Yes Features: *16" Brass Wand *47" PVC ¼" *6" Tank Mouth *Tubular Steel Pump Handle *Fan Nozzle *Shoulder Pads *Agitation with Kit 34 (optional) Routine Maintenance and Safety The sprayer you have purchased is of the highest quality - we use the finest virgin plastic, high-grade seals and gaskets, and take every precaution in the manufacturing of these units. However, the successful long-term and safe operation of your sprayer resides with you. You must take precautions to protect yourself and maintain your sprayer regularly to ensure its longevity. Use proper protective gear and necessary clothing (gloves, goggles, spray suit, etc.) Important Points Wash out the tank of your sprayer each time you use it, Chemicals should not be left in the sprayer, Seals and O-rings should be routinely inspected. These routine checks will reveal when new seals and O-rings should be installed, and Replace seals, hoses, pumps, straps, etc. that are deteriorating to prevent leaks and accidents. After Each Use of the Sprayer: 1.Empty remaining spray solution from the sprayer tank. Dispose according to the chemical manufacturer's instructions. 2.Pour approximately one gallon fresh water into the tank and run through the sprayer. 3. Store your sprayer in a dry, shaded area to ensure a long life.