Dosatron D25RE2 Non-Electric Proportional Water Powered Dosing Pump, 11 GPM, Injection Rate 0.2-2% Operating Flow 1/3 Pint Per Minute to 11 GPM Operating Pressure 4.3 to 85 PSI Concentrate Additive Injection 0.011 Fluid Ounce per Min to 0.22 GPM Max Temp 104F with Manual, Accessories, Never Used, In Original Packaging