Frigidaire WF3CB installation and information video. The Frigidaire water filter WF3CB produces cleaner, better tasting drinking and cooking water by reducing chlorine, sediment and other contaminants. The WF3CB water filter is located at the top right side of the fresh food compartment. The Frigidaire PureSource3 is tested and certified to NSFANSI Standards 42 and 53 for the reduction of lead, mercury, atrazine, lindane, toxaphene, cysts and microorganisms and many other contaminants.