20'' Resin Filter Cartridge 1.Specifications ion exchange resin filter 2.Strongly acidic cation exchange resin 3.Used for drinking water softening and desalination 4.The post catbon filter cartridge and inline carbon filter cartridge are usually used as the last stage of the Ro system. They are made of the grannlar coconut carbon, which have fine effect of filtration for removing. 20'' Resin Filter Cartridge Model No.:20'' Resin Filter Cartridge Type:20'' Resin Filter Maximum Flow:1.5GPM Maximum Pressure:125PSI Maximum Temperature:50 degree C Replaced period:Every6-9months,depends on water qulailty