Mineral clear filters over natural minerals for crisp refreshing taste. Easy-to-change PUR replacement filter provides quality water, right from your tap. PUR water costs less than bottled water. Automatic Safety Monitor Gauge : This patented feature comes standard on every vertical PUR faucet mounted model. It takes all the guesswork out of knowing when your filter is ready to be replaced. Bypass feature: With a twist of the wrist, the faucet mount tilts back to allow easy access to the sink and unfiltered water for washing dishes. For replacement filter 1-pack use, model No. RF-9999 (SKU 418293). Removes up to 99.99% cryptosporidium and giardia cysts.