Introduction
This manual provides essential information for the proper use and maintenance of your Thereye RO Water Filter Element, model WP03. This element is specifically designed for integration with Thereye 700 GPD Undersink Tankless Water Filter Systems, ensuring optimal performance and water quality.
Product Overview
The Thereye RO Water Filter Element (WP03) is a critical component of the multi-stage filtration process in your Thereye 700 GPD undersink tankless water filter system. It utilizes a 0.0001 micron Reverse Osmosis (RO) membrane to effectively reduce various contaminants from your drinking water.

Image: The Thereye RO Water Filter Element, model WP03, shown individually. This element is designed for the 700 GPD undersink tankless water filter system.
Key Features of the Thereye 700 GPD System (using WP03 RO Element):
- Advanced Filtration: The system, incorporating this RO element, employs compound filtration technology to reduce pollutants and improve water taste. The 0.0001 micron RO membrane specifically targets TDS, PFAS, PFOS, heavy metals, and other harmful substances.
- High Capacity: The system can produce up to 700 gallons of filtered water per day, providing a fast water supply.
- Tankless Design: This design saves space and minimizes the risk of secondary contamination associated with stored water.
- Efficient Water Usage: The system achieves a pure-to-waste water ratio of 2:1.
- Easy Filter Exchange: The twist-and-pull design allows for quick filter replacement without tools.

Image: Diagram illustrating the 8-stage filtration process of the Thereye 700 GPD system. The RO membrane (Stage 6) is highlighted as a key component.
Specifications
| Brand | Thereye |
| Model Number (Filter Element) | WP03 |
| Material | Mesh |
| External Testing Certification | ETL |
| Item Weight | 2.53 pounds |
| Package Dimensions | 14.76 x 4.8 x 4.72 inches |
| Unit Count | 1.0 Count |
Note: These specifications pertain to the individual RO filter element WP03.
Maintenance: Filter Element Replacement
The Thereye 700 GPD system includes a built-in lifespan reminder for filter elements. When the RO filter element (WP03) requires replacement, the system's display faucet will indicate this. Regular replacement ensures continued optimal performance and water quality.
Recommended Replacement Schedule:
- RO Filter Element (WP03): Approximately every 36 months (3 years).
- PPC Filter Element: Approximately every 12 months (1 year).
Note: Actual filter lifespan may vary based on local water quality and usage volume.
Replacement Procedure:
- Turn off the water supply to the filter system.
- Locate the RO filter element on your Thereye 700 GPD system. It is typically labeled "RO".
- Twist the old RO filter element counter-clockwise to unlock it.
- Pull the old filter element out from the system.
- Insert the new WP03 RO filter element into the designated slot.
- Twist the new filter element clockwise to lock it into place. Ensure it is securely seated.
- Turn the water supply back on.
- Reset the filter life indicator on your system's faucet display, if applicable, following the system's instructions.
- Flush the new filter by running water through the system for several minutes as per your main system manual.
Video: This video demonstrates the twist-and-pull method for replacing a filter element in the Thereye water filtration system. It shows how to unlock, remove, insert, and lock a new filter element.

Image: Illustration showing the Thereye water filter system with labels indicating the PPC filter (12 months) and RO filter (36 months) replacement intervals.
Troubleshooting
If you encounter issues after replacing your RO filter element, consider the following common troubleshooting steps:
- Low Water Flow: Ensure the new filter element is fully seated and locked. Check for any kinks in the water lines.
- Unusual Taste/Odor: Flush the system thoroughly by running water for an extended period (e.g., 15-30 minutes) to remove any residual air or carbon fines from the new filter.
- Leakage: Verify that the filter element is correctly installed and locked. Check all connections for tightness. The system has a built-in leak-proof function that triggers an E1 error code on the faucet if a leak is detected.
- TDS Readings Not Improving: Ensure the RO filter element is the correct model (WP03) and is installed correctly. If the issue persists, contact customer support.

Image: Diagram showing the internal structure of the filter system with water leakage protection and an overview of the easy installation process, including connections to the faucet and power.
Warranty and Support
Thereye is committed to providing reliable products and customer satisfaction. For any questions regarding your RO Water Filter Element WP03 or the Thereye 700 GPD Undersink Tankless Water Filter System, please refer to the main system manual or contact Thereye customer support.
Our after-sales team is available to assist with installation, troubleshooting, and general inquiries.
For further assistance, please visit the official Thereye store on Amazon: Thereye Store

