Water Filter Replace ForEPTWFU01CUNILUX ULX220EPTWFU01 or EPTWFU01T NSF 42, 53 and 401 licensed to filter out contaminants: Tested and licensed by way of NSF International against NSF/ANSI criteria 42, fifty three and 401 in PureSource Ultra II – U and PureSource Ultra II – M for reduction of claims at the performance information sheet Compatible Frigidaire Filter Model/Part Numbers: EPTWFU01 or EPTWFU01T EPTWFU01C 4562222 012505454226 UNILUX ULX220