Home Master CFRFGAC20-20BB Radial Flow GAC 20 Micron Replacement Water Filter, White Fits Home Master Carbon Filter Typical lifecycle: 100,000-Gallon or 1 year Radial Flow design provides excellent chlorine and chemical filtration with minimal pressure drop Feed water: PSI 20 - 100 PSI Feed water Temperature: 40 Degree - 100 Degree F