the inventive method inverts and activates polymer , and delivers it to an output at a relatively high concentration of polymer in an electrolyte fluid , such as water . the inversion and activation results from four steps : premixing polymer and a diluent , blending the premixed polymer / diluent in a derated centrifugal pump , recycling a portion of the blended mix , and suddenly relaxing the pressure to relax the polymer in the blended polymer / diluent mixture . a secondary source of the fluid is applied at the output to the high concentration in order to dilute it to a desired level of concentration . a pilot controlled valving system controls the secondary source of the fluid and maintains a uniform dilution despite any fluctuation in the delivery of the fluid to the activating system . a sensor at the output feeds back a control signal to maintain a uniform level of polymer activity in the outflow from the system . a check valve monitoring system gives an alarm if water seeps back toward a source of polymer which is to be activated .