AQUACREST Replacement AP517 Under Sink Water Filter, Compatible with Aqua-Pure AP517, AP51711, AP510, AP517EA Efficient coconut carbon block for ultimate purity by reducing harmful contaminants. Note: For cold water only! Optimal performance for up to 6 months or 2,000 gallons, which will vary based on water conditions. Offers reasonable price without compromising quality. Easy to install. For detailed instruction, please kindly refer to the Instruction Manual in the box. Interchangeable with Aqua-Pure AP517, AP510, AP517EA. This filter is not sourced by or sponsored by 3M. Advanced material for refreshing water Easy setup wizard. Optimum results for up to 2,000 gallons or 6 months, whichever comes first will vary based on water quality