AQUACREST AP5527 Reverse Osmosis Pre and Post Water Filter Cartridge, Replacement for Aqua-Pure AP5527, 5598101, AP-RO5500, APRO5500 Reverse Osmosis System (1 Set), Model No.WF59.

After an upgrade, the model number changed from AQU-AP5527 to AQU-WF59, and the filter uses lead-free materials that are IAPMO certified to NSF/ANSI 372. IAPMO tested to NSF/ANSI 42, it is designed to help reduce chlorine, taste, and odor, and its coconut shell carbon block also helps reduce sediment, rust, and certain heavy metals while maintaining a steady water flow. For best results, replacement is recommended every 12 months or 6,000 gallons, whichever comes first, depending on local water conditions. Compatible with Aqua-Pure AP5527, 5598101, and AP-RO5500/APRO5500 under-sink reverse osmosis systems.

• Upgraded Model Number: After an update, the model number changed from AQU-AP5527 to AQU-WF59.
• Certified Lead-Free Materials: Made with lead-free materials and IAPMO certified to NSF/ANSI 372 (lead-free materials).
• Tested Filtration Performance: IAPMO tested to NSF/ANSI 42 to help reduce chlorine, taste, and odor. The coconut shell carbon block is also designed to help reduce sediment, rust, and certain heavy metals.
• Steady Flow: Designed to provide a fast yet stable water flow for everyday use.
• Service Life & Compatibility: Replace every 12 months or 6,000 gallons, whichever comes first, depending on local water conditions. Compatible with Aqua-Pure AP5527, 5598101, and AP-RO5500/APRO5500 under-sink reverse osmosis systems.