Great for Well Water - removes up to 98-percent of iron, chemicals, heavy metals, sediment, and other contaminants, and 99.9-percent of viruses, bacteria and other microorganisms * Filter element and the filter housing are all-in-one modular assembly for quick and easy annual changes - No wrenches necessary * Included Fast Flow RO Kit - Double the flow from your faucet to fills your cup twice as fast as standard RO systems * Audible Alert indicates need to replace UV filter * Smooth, delicious bottled water quality without the inconvenience or high price of buying bottled water