A Motor Driven Diaphragm Metering Pump with Manual control, Adjustable stroke length to turndownthe output flow. Provides dosing from 3 GPD @ 100 PSI to 100 GPD @60 PSI. Available with PVC reagent head for a wide range of chemical compatibility. Each pump is complete with bleed valve, tubing, foot valve and 1/2"NPT injector to complete any installation.