Costs less than the Whirlpool brand without compromising quality or flow rate. Installation instructions: 1. Note: Filter must be pushed firmly into receiver and turned until filter is locked in place. If filter is not locked correctly, water will not flow. 2. DO NOT use any tools to install this filter 3. Twist the old filter a quarter-turn counterclockwise 4. Pull the filter straight down and discard (don't worry, the water will shut off automatically) 5. Push the new filter into the fridge until it stops and twist the filter a quarter-turn clockwise 6. Reset your change filter light (if your fridge has one) 7. Flush filter with 3-4 gallons of with water until water runs clear. Some noise is not uncommon as air is purged from the system. 8. If filter sets for several days without use, flush a quart of water through the filter to remove stale water from refrigerator water lines. To reduce the risk associated with the property damage due to water leakage, you must read and follow installation and use instructions before installation and use of this product. The disposable filter cartridge should be replaced at least every 6 months. DO NOT INSTALL ON HOT WATER SUPPLY LINES. DO NOT INSTALL IF WATER PRESSURE IS HIGHER THAN 125 PSI. CRF will not be legally responsible for any damage, including but not limited to property damage caused by water leakage.