The 3M CUNO FM-1500 is the correct system that uses the following replacement cartridge:
The 3M CUNO Water Factory High Performance Filter Cartridge System is a high absorption activated fibrous carbon block filter system that reduces contaminants such as lead, sediment, cysts, asbestos, chlorine, unpleasant odor and taste from your drinking and cooking water. The 3M CUNO FM-1500 Replacement Filter DWS is designed with a distinctive radical flow cartridge feature that provides a high flow stream of drinking water.
3M CUNO FM-1500 High Performance Drinking Water System specifications:
The CUNO Water Factory FM-1500 DWS Filter System is NSF International Certified against NSF/ANSI Standard 42 and 53 that has a gallon capacity of 1,500 gallons (5,678 liters) of water. For optimum performance, based on usage and water quality, change your FM-1500 Filter cartridge every 6 to 12 months. The 3M CUNO 05-61001 filter is also compatible with the Waste King FM DWS 1500 cartridge.