Dosatron injectors will accurately injects: fertilizers, insecticides,fungicides, algaecides, acids, wetting agents, disinfectants and sanitizers. Dosatron injectors are non-electric, water powered and piston-driven. Unit operates on positive displacement. Concentrate is directly proportional to volume of water, resulting in high accuracy. Ratio: 1:500 to 1:50. Pressure: 4.3 to 85 psi. Pipe size: 3/4" NPT. Size: 19-1/8" x 6-5/16". Weight: 6 lbs. D14MZ2.