The ULTRAWF water filter is a highly compatible model. This model is interchangeable with certain many refrigerator parts by Frigidaire, such as part numbers 242017800, 242017801, A0094E28261, PS2364646, and ULTRA-WF. Such flexibility makes the ULTRAWF model filter an attractive purchase to many water filter consumers. The original OEM to the ULTRAWF model is manufactured by Frigidaire. This Frigidaire OEM met NSF International Standards when it was tested against Standard 42 and Standard 53. Such passing certifications confirm a high filtration performance against chlorine, chemicals, dirt, and cysts. To ensure optimal water filtration performance, make sure to change your water filter at least once every six months. In doing so, it will guarantee you and your family healthy, clear, and clean drinking water to consume at an optimal dispense rate.