Chapin 22790XP 3-Gallon Industrial Heavy Duty Sprayer For Use With Most Industrial Chemicals, 3-Gallon (1 Sprayer/Package) 3-Gallon poly tank with wide mouth opening for easy filling and cleaning Compatible with most industrial chemicals, suitable for homeowners too (check chemical manufacturers instructions) 36-inch brass wand, nozzle and shut-off with Lock-on feature Viton seals and gaskets designed for industrial and concrete applications Pressure relief valve built into the tank