Crystal Quest Countertop Replaceable Triple Fluoride Water Filter System CRYSTAL QUEST Mega Countertop Replaceable Triple Fluoride Water Filter System is dependable and built to last for years. This counter top system installs in seconds and sits on the countertop for water on demand. Quick and easy to use, stylish, convenient, and effectively removes FLUORIDE and many contaminants from water. Option: Washable Pre-filtration Filter - Model CQE-CT-00143 Use for any countertop/faucet and helps remove the sediment thus enabling your filter to work more efficiently. A diverter valve switches between filtered and unfiltered water.