Household water filter with reverse osmosis 5-stage filtration systerm,PP,GAC,CTO,RO,Post-AC, Household water filter with reverse osmosisHousehold water filter 1.Filtering process: Step one: Preceding precipitation filter core,filtering adsorption in tap water,more than 5 microns in diameter of the colloid impurities, micro mud, rust, bacterial virus, organic pollution minerals sundry etc. Step ...