3M AP1-E 47-234825 SQC Sanitizing & Service Cartridge

3M 47-234825 SQC Reusable Sanitizing Service Cartridge. AP1-E 3M service and sanitizing cartridge for SQC drinking water systems by Water Factory, CUNO and 3M.  Use these cartridges in place of your SQC filters during service.  You will need 3 cartridges for a 3 stage SQC RO system and 4 cartridges for a 4 stage SQC RO system.