PUR 3 Stage Vertical Faucet Water Filter with Swivel Spray in chrome finish... The PUR FM-3400 faucet filter is a 2-stage water filtration system that removes 99.99% microbial cysts cryptosporidium and giardia. The faucet water filter system has an automated filter life indicator to inform you when to change the filter. The filter lasts up to 100 gallons or approximately 2 to 3 months. The faucet filtration system allows you to switch between filtered and unfiltered water. The swivel spray feature allows you to adjust the water where you need it. The faucet filter has an added layer to trap sediment and an improved activated carbon filter. The replacement filter for this PUR FM-3400 faucet filter system is the PUR RF-9999 (1072398700544) faucet filter. Includes one 3 Stage Water Filter Replacement.