Cartridge for use with water filter system #240-144, or for ice machines with production up to 600 lbs. Simple cartridge change-outs with just a quarter turn. Cartridge replacement recommended every six months. Micron Rating*: 1 Capacity: 10,000 Gallons Flow Rate (GPM): 1.5 gpm *Micron Rating refers to the size of particles the cartridge will block.