Quick Connect Filter, For Use With Steam Treatment Systems, Reduces Scale, Micron Rating 0.5 micron, Flow Rate 6 gpm, Diameter 5 1/8 in, Overall Height 12 1/2 in, Service Life 500 gal, Filter Media HydroBlend Polyphosphate, Maximum Temperature 100 Degrees F, Application Steam Equipment, Standards NSF 42, Series SR-X, Features Unit Dispenses a Controlled Amount of Hydroblend(TM) Polyphosphate Compound for Greater Effectiveness Compared to Standard Phosphate Treatments, Maximum Pressure 125 psi