AQUACREST Replacement 3375 Water Filter, Compatible with Pur RF-3375 Faucet Replacement Water Filter (Pack of 3) Delicate design ensures a perfect fit for the original. Optimal performance for up to 3 months or 100 gallons, whichever comes first will vary based on water conditions. Convenience and value Easy to install. For detailed instruction, please kindly refer to the Instruction Manual in the box. Interchangeable with PUR faucet systems, PUR RF-3375. This filter is not sourced by or sponsored by PUR. The manufacturers name and part number have been used for reference purposes only. Easy setup wizard Optimum results for up to 100 gallons or 3 months, whichever comes first will vary based on water quality