There are two brands you can choose for the MSWF model water filter; GE, and EcoAqua EFF-6022A. The GE brand is the factory original OEM product. The EFF-6022A is an aftermarket version of the MSWF model water filter. All brands have advantages and disadvantages that will factor into your purchase decision process. The strength of the factory original GE MSWF lies in its NSF/ANSI International certifications. The GE brand was certified against Standard 42 and Standard 53, very high grades in regards to water filtration performance. The EcoAqua Eff-6022a product does not carry the same NSF certification. The GE brand, however, is the most expensive. The EcoAqua brand is most wallet-friendly in regards to price. The EcoAqua brand matches the specifications of the original filter in terms of temperature limits, operating pressure limits and filtration capacity.