Solo 425 4-Gallon Professional Piston Backpack Sprayer is a high-quality backpack sprayer that is designed to make application of fertilizers, disinfectants, pesticides, herbicides and other formulation much easier. Its 4-gallon tank is constructed of high-density polyethylene with ultra-violet inhibitors to ensure durability and UV protection. It features a shut off valve, 4-feet high-pressured hose and a 28-inch wand to let you reach those hard-to-treat areas easily. It also comes with chemical-resistant Viton seals to ensure key areas will be secured and padded shoulder traps to allow you to carry your sprayers comfortably. It is also capable of producing wide pressure range for up to 90 psi with the help of its rod-activated piston pump, making it virtually possible to perform every spraying task efficiently. Its 4.25 in. opening allows you to clean and fill it easily.
1 for pesticides, 1 for herbicides, 1 for anything else. bought one over 40 years ago to spray paraquat around fruit trees. used trailer sprayer to spray pesticides on trees. found 2 on curbs that were thrown out. cleaned and replaced rubber parts. have used these for 25 years as i sold orchard. always store upside down to keep any residue off rubber parts. have had NO problems with any for over last 20 years.