A Solenoid Metering Pump with Stroke Length and Frequency adjustments, 100:1 turn down. Provides manually controlled dosing from 12 GPD @ 150 PSI to 240 GPD @80 PSI. Available in PP or PVC materials and TFE seals with TFE or SS check balls. Each pump is complete with bleed valve, tubing, foot valve and 1/2"NPT injector to complete any installation.