The Dosatron water powered doser inject nutrients, supplements/additives and pH adjusters into irrigation water with ease. Dosatron is a passive precision fertilizer doser that accurately mixes from the pressure of your incoming water (no electricity needed). The water pressure forces the solution downstream. Operating pressure range is 7 -85 PSI and water flow range is 0.05 - 14 GPM. Injection capabilities of 1:100 to 1:10 (1 to 10%) [1.280 to 12.800 ounces per gallon]. Unit has 3/4 in NPT connections. Includes mounting bracket, suction hose, bypass, union, weighted strainer, and quick start guide. Mini-maintenance seal kit for Dosatron Dosers - should be replaced on an annual basis.