Good, Working LMI Milton Roy Chemical Metering Pump A141-818SI 0.5 GPH, 250 Max PSI. We do not have tubing or a User Manual for this pump.

Connections / Discharge (Inches)Tubing PE 1/4" O.D.
DiaphragmFluorofilm
Flow ControlDual Manual Control
Head / FittingsPVC / PVC (FastPrime Head w/4 Function Valve - Molded Head w/Double Ball Check Valves)
Hz50/60

Maximum Flow (GPD)12
Maximum Flow (GPH)0.5
Maximum Pressure (PSI)250
Maximum Strokes Per Minute240
Maximum Viscosity (CPS)400
Product NotesNew LMI PD Series Replacement Pump, PD741-828SI Upgrade From A141-818SI
Turn Down Ratio1200:1
Valve BallsCeramic
Valve / Seat / O-RingPTFE / Polyprel
Voltage115