Dosmatic MiniDos 12 Injector, 2.5% - 12 GPM Installed directly in the fluid supply line, the injector operates without electricity Flow rate of .03 GPM to 12 GPM Operates at pressures from 6 PSI to 140 PSI Pipe coupling is 3/4" NPT Use for: chlorination, cleaning, cutting fluids, descaling, decontamination, degreasing, disinfecting, and more