WaterSentinel WSG-1 Made in USA Refrigerator Replacement Filter: Fits GE MWF Filters. This water sentinel refrigerator water filter contains a compressed carbon block which provides tremendous capacity to remove and/or reduce impurities and sediment that may be present in your drinking water. The carbon block has millions of active sites on its surface and within the structure which can absorb impurities like a sponge, and can absorb and hold other types of impurities on its surface like a magnet. Additionally, this filter can catalytically breakdown other impurities very similar to the way a catalytic converter works in your automobile. These processes ensure that you are getting the cleanest and best tasting water possible. 90 Day warranty against manufacturer defects from date of sale with invoice. For Customer Service call 866-218-8473 Filter Fits: GE Filters: MWF, GWF, MWFA, GWFA, GWF06 Hot Point Filters: HWF, HWFA Kenmore Filters: 46-9991 Guaranteed by WaterSentinel Flow Rate: .5 gpm (1.89 lpm) Operating Temperature: 33 -100 F (0.6 -38 C) Min Operating Pressure: 30 psi (207 kPa) Max Operating Pressure: 100 psi (689 kPa) Life: 6 months or 300 gallons (1,136 liters) Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before and/or after the system. This filter has been independently tested to NSF/ANSI 42 to remove over 97% of chlorine taste and odor.