REPLACEMENT MODEL: This is a replacement comparable part to GE RPWF & WaterSentinel WSG-4, PYE23KSD, GNE26GSD, GFE29HSD, and PWE23KSD. DESIGNED TO FIT: Refrigerator models that require the GE RPWF, NOT with a chip recognition and will not work with refrigerators needing RPWFE NSF/ANSI STANDARD 42 CERTIFIED: Reduces chlorine taste and odor ata flow rate of 0.5 gpm to a capacity of 300 gallons.*