Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Waterdrop X8-PRO Dual Flow Reverse Osmosis Water Filter System. Please read this manual thoroughly before installation and use to ensure proper function and safety.
The Waterdrop X8-PRO is an 800 GPD tankless RO system featuring 9-stage filtration, designed for undersink installation. It includes an LED faucet and is BPA-free, providing both pure RO water and filtered water for various kitchen needs.
Important Safety Information
- Ensure all connections are secure to prevent leaks.
- The system requires an under-sink electrical outlet.
- Faucet installation requires drilling holes in the countertop.
- Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
- Operating temperature range: 41°F (5°C) to 100°F (38°C).
- Maximum supported water TDS level: 500 PPM.
Included Components
The Waterdrop X8-PRO system package includes the following items:
- Waterdrop X8-PRO RO System Unit
- Replacement Filters (F1G, F2W, F3)
- Smart Faucet with LED display
- User Manual (this document)
- Necessary tubing and connectors for installation

Image: Waterdrop X8-PRO RO System unit with the smart faucet.
Setup and Installation
The Waterdrop X8-PRO system is designed for undersink installation and typically takes about 30 minutes to set up. Proper installation is crucial for optimal performance and to prevent leaks.
Pre-Installation Checklist:
- Verify you have all included components.
- Ensure sufficient space under your sink for the unit (Dimensions: 18.2"L x 6.25"W x 16.72"H).
- Confirm an available under-sink electrical outlet.
- Prepare for drilling two holes in the countertop for the RO faucet and drain pipe connection.

Image: Tankless design of the Waterdrop X8-PRO system installed under a sink, showing dimensions.
Installation Steps Overview:
- Prepare the Installation Area: Clear the space under your sink. Turn off the cold water supply.
- Install the RO Faucet: Drill a hole in your countertop (if not pre-drilled) and mount the smart RO faucet.
- Connect the Feed Water Adapter: Install the feed water adapter to your cold water line.
- Install the Drain Saddle: Attach the drain saddle to the drain pipe.
- Connect Tubing: Connect the pure water, drain, and inlet tubing to the corresponding ports on the RO system and faucet. Ensure tubing is fully inserted until it reaches the mark and lock clips pop up to prevent leaks.
- Install Filters: Insert the F1G, F2W, and F3 filters into their respective slots.
- Power On: Plug the system into the electrical outlet.
- Flush the System: Follow the initial flushing procedure outlined in the detailed manual to prepare the system for use.
For a comprehensive visual guide, please refer to the installation video below:
Video: Detailed instructions on how to install the Waterdrop X8-PRO Reverse Osmosis System.
Operating Instructions
The Waterdrop X8-PRO provides an innovative dual water flow system for various kitchen needs.
Video: Overview of the Waterdrop X8-PRO Tankless Reverse Osmosis Water Filter features.
Dual Water Flow System:
The Waterdrop X8-PRO features an innovative dual water flow design, providing two types of water:
- Pure RO Water: Delivered through the dedicated smart RO faucet for drinking and cooking. This water undergoes 9-stage filtration.
- Filtered Water: Delivered through your existing kitchen faucet for washing dishes, fruits, and vegetables. This water undergoes 5-stage filtration, reducing chlorine and odor.

Image: Illustration of the dual water flow system, distinguishing between pure RO water from the smart faucet and filtered water from the existing kitchen faucet.
Smart Faucet Features:
The included smart faucet provides real-time information:
- TDS Monitor: Displays the Total Dissolved Solids (TDS) level of the pure RO water.
- Filter Reminder: Indicates when filters need replacement to ensure continuous water quality.
- Fault Alert: Notifies you of any system malfunctions.

Image: Close-up of the smart faucet display showing TDS levels and filter life indicators.
High Flow Rate and Water Efficiency:
The 800 GPD (Gallons Per Day) capacity ensures a high flow rate, providing instant pure water without waiting. The system also boasts a 2:1 purified water ratio, minimizing water waste compared to traditional RO systems.

Image: Visual representation of the 800 GPD flow rate and the 2:1 purified water to wastewater ratio.
Connecting to Other Appliances:
The Waterdrop X8-PRO can be connected to other kitchen appliances for complete water purification. An optional XT Kit may be required for certain connections.
- Refrigerator: Provides stable pure water for ice makers and water dispensers.
- Dishwasher: Supplies filtered water for cleaner dishes and reduced scale buildup.
- Ice Maker: Ensures fresh, RO-filtered ice.

Image: Diagram showing the Waterdrop X8-PRO system connected to a refrigerator.

Image: Diagram showing the Waterdrop X8-PRO system connected to a dishwasher.

Image: Diagram showing the Waterdrop X8-PRO system connected to an ice maker.
Filtration Technology
9-Stage RO Filtration (for Pure RO Water):
The dedicated RO faucet provides water purified through a 9-stage filtration process, including a 0.0001 µm RO membrane. This process is SGS-tested to effectively reduce TDS, PFOA, PFOS, chlorine, fluoride, arsenic, lead, and other impurities.
- Mesh filter cotton
- Origami cotton
- Precision Activated Carbon
- Scale inhibitor
- PP cotton
- 0.0001µm RO Filtration
- Non-woven fabrics
- Activated carbon filtration
- PP cotton

Image: Diagram illustrating the 9-stage filtration layers of the Waterdrop X8-PRO system.
5-Stage Filtration (for Filtered Water):
Water delivered through your existing kitchen faucet undergoes a 5-stage filtration process, primarily focused on reducing chlorine and odors, making it suitable for washing food and dishes.

Image: Demonstrates washing food with filtered water, emphasizing the reduction of chlorine and odor.
Maintenance and Filter Replacement
Regular maintenance, especially timely filter replacement, is essential to ensure the continuous performance and longevity of your Waterdrop X8-PRO system.
Filter Lifespan:
- F1G Filter: Approximately 12-month lifespan.
- F2W Filter: Approximately 6-month lifespan.
- F3 RO Filter: Approximately 24-month lifespan.
The smart faucet will provide filter life reminders. The system also features automatic water shutoff during filter replacement for convenience.

Image: Diagram showing the Waterdrop X8-PRO filters (F1G, F2W, F3) and their respective lifespans.
Filter Replacement Procedure:
Filters can be replaced easily without tools in approximately 3 seconds per filter.

Image: Illustration of the tool-free filter replacement process for the Waterdrop X8-PRO.
For a visual guide on filter replacement, please watch the video below:
Video: Instructions on how to replace the filters in the Waterdrop X8-PRO Reverse Osmosis System.
Resetting Filter Lifespan Indicator:
After replacing a filter, you will need to reset its lifespan indicator on the system unit. To reset, press and hold the corresponding filter button (F1, F2, or F3) on the system unit for 7 seconds until the system beeps and the indicator light changes.
Troubleshooting
If you encounter any issues with your Waterdrop X8-PRO system, please refer to the following common troubleshooting tips. The smart faucet's fault alert feature can also help identify problems.
- No Water Flow: Check water supply valve, ensure system is plugged in, and filters are correctly installed.
- Slow Water Flow: Filters may be clogged and require replacement. Check for kinks in tubing.
- Leaks: Inspect all connections for tightness. Ensure O-rings are properly seated.
- Unusual Taste/Odor: Filters may need replacement. Ensure proper system flushing after installation or filter change.
- TDS Reading High: RO membrane (F3 filter) may need replacement. Ensure proper flushing.
For more detailed troubleshooting or issues not covered here, please contact Waterdrop customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | Waterdrop |
| Model Name | WD-X8W |
| Product Dimensions (L x W x H) | 18.2" x 6.25" x 16.72" |
| Item Weight | 16.58 Kilograms |
| Capacity | 800 Gallons Per Day (GPD) |
| Purification Method | Reverse Osmosis (9-stage filtration) |
| Material | BPA Free |
| Installation Type | Under Sink |
| Power Source | Corded Electric |
| Lower Temperature Range | 41 Degrees Fahrenheit (5°C) |
| Upper Temperature Rating | 100 Degrees Fahrenheit (38°C) |
| Supported Water TDS Level Maximum | 500 PPM |
| Included Components | X8-PRO RO System, Replacement Filters, Smart Faucet, User Manual |

Image: Detailed view of the Waterdrop X8-PRO system, highlighting dimensions and power connection.
Warranty and Support
Warranty Information:
Waterdrop products typically come with a manufacturer's warranty. Please refer to the warranty card included with your product or visit the official Waterdrop website for specific warranty terms and conditions applicable to your X8-PRO system.
Customer Support:
For technical assistance, replacement parts, or any questions regarding your Waterdrop X8-PRO system, please contact Waterdrop customer support. You can find contact information on the official Waterdrop website or in the documentation provided with your product.
Official Waterdrop Website: www.waterdropfilter.com