Easy Twist Installation / Removal For Use with all Global Water G3RO, G4RO and G5RO Water Coolers Sediment Filtration - Reduces particles / sediment as small as 5 microns ( .0002 in ) and adds life to the 1 micron filter Carbon Micron Filtration - Traps contaminants as small as 1 micron ( .0004 in ) while reducing lead, chlorine, cysts and organic contaminants Replace filters every 6 months.