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Culligan US-640 Water Filter System

The Culligan US-640 Water Filter System is no longer available.
The Culligan US-640 Under Sink Drinking Water System has been discontinued. The Culligan D-40 replacement filter and replacement parts are available.
  • Culligan US-640 Replacement Filter System:
  • One Culligan D-40 water filter cartridge included.
  • Filter cartridge life for the Culligan D-40 replacement filter is up to 6 months or 600 gallons of water. The water filter life also depends on the quality of your water and your water usage.
  • The Culligan D-30 under sink water filter also can be used in the Culligan US640 under sink system.
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