1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Waterdrop RF15 Replacement Filter Cartridge. The RF15 is designed to provide clean, safe, and healthy purified water by effectively reducing various contaminants. Please read this manual thoroughly before installation and keep it for future reference.
2. Compatibility
The Waterdrop RF15 Replacement Filter Cartridge is compatible with the following Waterdrop under sink water filter systems:
- Waterdrop 15UA Under Sink Water Filter System (ASIN B083NR5DVY)
- Waterdrop 15UB Under Sink Water Filter System (ASIN B089CVMPGR)
- Waterdrop 15UC Inline Water Filter for Refrigerator (ASIN B085G9T9TB)
This filter supports connection to your original faucet, a dedicated faucet, or your refrigerator's water line.

3. Key Features & Benefits
- Innovative Multistage Filtration: The RF15 utilizes advanced multistage filtration technology to effectively reduce PFOA/PFOS, PFAS, lead, heavy metals, chemical impurities, sediment, and other large particles.
- 0.5µm Precise Filtration: Designed for precise filtration, it specifically targets and filters out chlorine, improving water taste and odor.
- Certified Performance: Certified by IAPMO against NSF/ANSI 372 Standard for lead-free materials and NSF/ANSI 42 Standard for the reduction of chlorine, taste, and odor. Independently tested by a third-party laboratory against NSF/ANSI 53 standard for lead reduction.
- Ultra-Long Service Life: Each filter provides a maximum service life of 2 years or 19,000 gallons when used with municipal water, offering long-lasting performance.
- Enhanced Clogging Resistance: Features an upgraded filtration area, providing a 20X increase in dirt adhesion area to minimize the risk of clogging and enhance filtration capability.
- Quick & Easy Replacement: The twist-and-lock design allows for filter replacement in approximately 3 seconds without the need for any tools.
- Stable & Rapid Water Flow: Engineered to provide a consistent and fast water flow, capable of filling a 6oz cup in about 4 seconds.


4. Setup & Installation (Replacement)
This section outlines the steps for replacing your Waterdrop RF15 filter cartridge. Ensure you have a new RF15 cartridge before beginning.
Before You Begin:
- Turn off the cold water supply to your under sink filter system.
- Relieve any pressure in the system by opening the filtered water faucet until water stops flowing.
- Have a towel or small bucket ready to catch any residual water.
Replacement Steps:
- Remove the Old Filter: Locate the existing RF15 filter cartridge. Gently twist the old cartridge counter-clockwise (towards the 'Unlock' symbol) until it detaches from the filter head. Pull the old cartridge downwards to remove it.
- Prepare the New Filter: Remove the protective cap from the new RF15 filter cartridge.
- Insert the New Filter: Align the new cartridge with the filter head. Push the new cartridge upwards into the filter head and twist it clockwise (towards the 'Lock' symbol) until it is securely in place and you feel a click.
- Restore Water Supply: Slowly turn on the cold water supply valve.
- Flush the System: Open the filtered water faucet and let the water run for approximately 5-10 minutes to flush out any carbon fines and air from the system. The water may appear cloudy initially; this is normal. Continue flushing until the water runs clear.
- Check for Leaks: Inspect all connections for any signs of leaks.

5. Operating Instructions
Once the Waterdrop RF15 filter cartridge is installed and flushed, your under sink system is ready for use. Simply open your filtered water faucet to dispense clean, filtered water. The system is designed for continuous use and provides stable and rapid water flow.

6. Maintenance
Regular maintenance ensures optimal performance and water quality from your Waterdrop RF15 filter.
Filter Replacement Schedule:
The RF15 filter cartridge has an ultra-long service life of up to 2 years or 19,000 gallons, whichever comes first. This lifespan may vary depending on your local water quality and usage. It is recommended to replace the filter promptly when the water flow significantly decreases or the taste/odor of the water changes.

7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Slow water flow | Clogged filter cartridge | Replace the filter cartridge. |
| Unpleasant taste or odor | Filter cartridge needs replacement | Replace the filter cartridge. |
| Water leakage | Improperly installed filter or loose connections | Ensure the filter is twisted securely into the 'Lock' position. Check all water line connections for tightness. |
| Cloudy water after replacement | Air or carbon fines in the system | Flush the system by running water for 5-10 minutes until clear. |
8. Specifications
| Attribute | Detail |
|---|---|
| Brand | Waterdrop |
| Model Name | RF15 |
| Installation Type | Under Sink |
| Power Source | Manual |
| Item Weight | 1.91 pounds |
| Product Dimensions | 3.6 x 3.6 x 15 inches |
| Material | NSF/ANSI Approved Material Components |
| Capacity | 19,000 Gallons |
| Purification Method | Activated Carbon, Ultra Filtration, Ion Exchange |
| Special Feature | Replacement Filter for Waterdrop 15UA, 15UB, 15UC, 15UA-UF, 15UB-UF, 15UC-UF |
9. Warranty & Support
The Waterdrop RF15 Replacement Filter Cartridge comes with a 1-Year Manufacturer Warranty. For any questions, technical support, or warranty claims, please contact Waterdrop customer service.
- Contact Information: Refer to the packaging or the official Waterdrop website for the most current contact details.
- Online Support: Visit the Waterdrop Store on Amazon for additional product information and support resources.





