Product Description Built for comfort. Built for convenience. Built to last. SOLO sprayers are professional grade, triple test inspected and made in the USA. The SOLO 425, with a connecting rod-actuated piston pump, can produce a wide pressure range of up to 90 psi and is capable of performing virtually every spraying task. With a proven piston pump, you will be reliably equipped for applying spray liquid or insecticides in your garden. A low number of wearing parts and sturdy technology ensure a long service life and minimum maintenance. The large filling aperture for convenient filling of the tank and smooth-running pump make spraying pleasant work. The ergonomic design contours to your back for greater comfort. Amazon.com The Solo manual 4-gallon 90 psi high-pressure backpack sprayer features an ultraviolet resistant tank, felt padded polyester straps, a heavy duty pressure cylinder and reversible pump lever. The high pressure backpack sprayer is made of all high-grade, corrosion resistant plastic, with no metal or rubber parts made vulnerable to chemicals. The chemical backpack applicator includes a connecting rod actuated piston pump to produce a wide pressure range up to 90 psi, 4-foot high pressure hose, a spray tube of 20 in. and can carry up to 45 pounds. With its easy operating shut off valve, durable plastic parts, and 4-1/4-inch opening, it can handle disinfectants, fertilizers, herbicides, and pest control products for efficient tree, shrub, and plant protection. This tool is backed by a 1-year limited manufacturer's warranty. From the Manufacturer Since its introduction to the US market in 1964, Solo's popular 425 backpack sprayer has been the standard by which all backpack sprayers are measured. High-density polyethylene tank with ultra-violet inhibitors allows for unmatched durability and ultra-violet protection. Large 4.25-Inch opening for easy filling and cleaning. Shut-off valve and wand with an overall length of 28 inches for hard-to-reach places. 4-foot high-pressure hose. With its connecting rod-activated piston pump, the 425 is capable of producing a wide pressure range of up to 90-psi, and is capable of performing virtually every spraying task. Easily and effectively handles disinfectants, fertilizers, herbicides, pesticides, and formulations for tree, shrub and plant protection and wood and concrete finishing and treatments. Solo backpacks are constructed of high density polyethylene and other chemical resistant materials. A 1-year warranty is provided. Given proper maintenance, the sprayer should last for millions of pumps and many years of use. Each Solo sprayer is equipped with an adjustable, flat spray, hollow cone and jet stream nozzle to accommodate virtually every spraying need. Padded straps with pull tabs make adjustments quick and easy. Built-in strainers, screens and filters help keep debris out of nozzles. Pressure can be regulated to 15, 30 , 45 or 60 psi by means of a built-in pressure regulating valve. Unbreakable wand prevents damage common to brass and brittle plastic wands. Viton seals, gaskets and O-rings provide excellent chemical resistance and durability. See more