

What Makes the Waterdrop X8 Under-Sink Reverse Osmosis System Stand Out?
Waterdrop X8 Reverse Osmosis System
Equipped with an incredible 9-stage filtration system, the Waterdrop X8 provides exceptional water quality.
Each of the nine stages works meticulously to tackle specific impurities, including Chloride, Lead, , Fluoride, PFOA, PFOS, Sand, Salt, and various heavy metals. These layers of filtration not only remove particles but also improve the taste, smell, and overall quality of the water, providing a superior drinking experience right from your tap.
Conveniently installed under the sink, this system provides you with high-quality water without the need for bottled alternatives, making it a sustainable choice for your household. Enjoy the peace of mind that comes with knowing your water is filtered through one of the most thorough purification processes available


9‑Stage RO Filtration
Removes lead, fluoride, PFOA, PFOS, odors, and contaminants.

High Capacity & 2:1 Ratio
Produces 800 GPD with efficient water use and minimal waste.

Smart Faucet Monitoring
Smart display faucet with live TDS monitoring and filter life.

Tankless Space-Saving Design
Slim, tankless design saves 70% space.
Smart Display Faucet included
Control at your fingertips: The X8 fits under sink reverse osmosis system includes an innovative smart display faucet.
Always Know Your Water Quality: The Smart TDS Monitor & Filter Life Tracker
Our system puts you in control with a powerful Total Dissolved Solids (TDS) monitor that continuously checks the quality of your filtered water. This smart feature works alongside the built-in filter life tracker, which takes the guesswork out of maintenance by notifying you exactly when it’s time for a replacement. This ensures your water is always at its purest, saving you time and giving you peace of mind.
Extended Filter Life for Hassle-Free Maintenance
With a remarkable 24-month lifespan, the RO filter significantly cuts down on the hassle of frequent replacements. This extended life not only saves you valuable time but also reduces long-term costs, giving you peace of mind and more money in your pocket.
Maximise Your System's Performance: Why Authentic Waterdrop Faucets Work Best
To get the most out of your water filtration system, we highly recommend using the authentic Waterdrop smart faucet. While it's possible to use a standard three-way (tri-flow) tap, our smart faucet is specifically designed to ensure full compatibility and deliver a seamless experience. It's the simplest way to maximize your system's performance and enjoy all its features, including real-time filter life indicators. Using other brands may not be fully compatible, potentially affecting performance and functionality.

Effortless Filter Replacement: The Simplicity of Tankless Design
Replacing your filter has never been easier. With a tankless system, you can say goodbye to complicated maintenance. Simply give the old filter a twist counter-clockwise to remove it, and then insert the new replacement, rotating it clockwise until it locks securely into place. The entire process is designed to be quick and intuitive, saving you time and frustration.
Less Frequent Replacements
Our filters last longer because they only activate when you need water, unlike traditional systems that constantly hold and filter water in a tank.
Simpler Replacement Process
With fewer cartridges and a straightforward twist-and-lock design, the replacement process is far more streamlined and user-friendly.
Lower Filter Wear
Since the system only filters water on demand, the filters experience less wear and tear, extending their life and saving you money in the long run.

800 GPD High Capacity 2:1 Low Drain Ratio
The Waterdrop X8 reverse osmosis water filter system, is an enhanced version of traditional systems, and yields an impressive 800 gallons of filtered water daily. Featuring an impressively low drain ratio, this system produces a mere one cup of waste water for every two cups of pure water it delivers

Tankless Design
The tankless design effectively prevents secondary bacterial contamination and frees up 70% of the under-sink space. Additionally, it provides continuous access to filtered without the need for a bulky storage tank.

X8 Installation
Refer to the attached diagram and note that you will need to drill a hole in your countertop to place the smart faucet if one is not already available. Also, an adapter will be installed on your household water tubing to connect the RO system’s wastewater and input water tubing.
Electricity is required to run the RO system.
We advise against using well water as the source for our RO systems. Additionally, we do not recommend connecting a tankless RO system to a refrigerator, ice maker, or salt-based water softener.
It is strongly advised to install this RO system with components from Waterdrop. Installing with parts not provided by Waterdrop could lead to malfunctions or reduce the system’s and filters' lifespan.

Trusted Certifications
The Waterdrop X8 meets safety standards set by the EU and UKCA (United Kingdom Conformity Assessed)
It is NSF/ANSI 58 certified for TDS reduction and NSF/ANSI 372 certified for lead-free material, ensuring high-quality filtration.
View full report here: NSF_ANSI Standard



What makes this Undersink RO water filter stand out?
Equipped with a 9-stage filtration system, this RO filter removes impurities as small as 0.0001 microns. SGS testing confirms it reduces Chlorine, Lead, Fluoride, PFAS, among other contaminants, ensuring clean and refreshing water every time.
How does this RO system perform in terms of filtration?
This RO system’s 9-stage filtration eliminates impurities down to 0.0001 microns. Certified by SGS, it cuts down on Chlorine, Lead, Fluoride, PFAS, and other harmful substances. so you always get the freshest, cleanest water.
How simple is it to install this under-sink water filter, and will I need a professional?
The tankless design of this RO filter makes setup fairly straight forward. However, if don't have basic plumbing skills we would suggest contacting a local plumber. Feel free to contact our friendly team if you need advice !
If I have any issues, who can I contact for support?
Our friendly team is hereif you need advice, simply call 0121 630 1130 or email us on info@regalflow.co.uk
Warranty Information
- 2 Years
Waterdrop Filter Instructions X8
Full Specification
Model Number | WD-X8 |
Certification | NSF/ANSI 58 & 372 |
Pure to drain | 2:1 |
Materials | System cover: BPA-free plastic Faucet: smart display faucet RO filter: reverse osmosis membrane CB filter: carbon block CF filter: PP cotton & carbon block |
Product dimensions | 18.2" x 6.25" x 16.72 (L*W*H) |
Item weight | 36.37 pounds |
Faucet | Smart Screen Faucet |
Flow rate | 800 gallons per day (GPD), 0.56 gallon per minute (GPM) |
Indoor or outdoor use | Indoor use only |
Electricity Required | Yes |
Ready to accept your tap water isn't up to standard? Filters and Delivery are included
Waterdrop X Series Reverse Osmosis System X8 Reviews
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