With over 15 years of experience in the home and water treatment field, we have tested and installed thousands of filter systems. However, today we’re diving deep into one of the most innovative models: the Mizudo Tankless RO System. Whether you’re looking to purify drinking water or improve your home’s overall water quality, this system is turning heads—and for good reason.
Wits Engineer Verdict
The Mizudo Zero Stale Tankless RO System is impressive. It combines advanced water filtration technology with an easy-to-install design that saves space under your sink. If you values clean, fresh-tasting water without the hassle of a bulky, traditional RO system, this is a solid option. Its high filtration capacity, space-saving design, and smart features, such as Wi-Fi connectivity and real-time water monitoring, really make it stand out.
However, like any system, it has its drawbacks. It’s on the pricier side, and some users have mentioned that the noise can be slightly noticeable during operation.
However, overall, the value you get from this system, in terms of water quality, ease of use, and long-term performance, makes it a worthwhile investment for many.
Pros and Cons
Pros:
- Tankless Design: Saves precious under-sink space. No bulky storage tank taking up space!
- High Filtration Capacity: With models offering up to 800 GPD, it’s ideal for larger households or those who consume a lot of water daily.
- Smart Faucet Technology: Displays real-time data on water quality, including TDS (Total Dissolved Solids) levels and filter life. You’ll know exactly when it’s time to replace your filters.
- Efficient Filtration: The system removes over 1,000 contaminants, including chlorine, fluoride, lead, heavy metals, and PFAS (forever chemicals).
- Eco-Friendly: Thanks to its 3:1 pure-to-drain ratio, it wastes far less water than traditional RO systems.
Cons:
- Higher Initial Cost: This system is definitely not the cheapest on the market.
- Noise: Some users report that it can be a little noisy during operation, especially if it’s installed in thin cabinetry.
- Installation Complexity: While it’s fairly simple for anyone familiar with basic home improvements, you’ll need an electrical outlet for the faucet and possibly a bit of extra space to fit the system.
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Instant Review
The Mizudo Tankless RO System is an excellent option for families or individuals who need a high-capacity filtration system but want to save space. It’s efficient, stylish, and removes a wide range of contaminants.
Additionally, the smart faucet and Wi-Fi connectivity make it easy to monitor and maintain. The only caveat? It’s on the expensive side, and you’ll need to be okay with some noise while it’s running.
Specs
Let’s talk numbers. Here’s the technical breakdown of the Mizudo Tankless RO System:
- Capacity: 800 GPD (Gallons Per Day) or 1000 GPD (depending on the model).
- Dimensions: 17.7″ x 5.5″ x 15.4″ (compact enough for most under-sink spaces).
- Filtration Stages: 9-stage filtration process.
- Pure-to-Drain Ratio: 3:1 (for every 3 gallons of purified water, it wastes only 1 gallon).
- Flow Rate: Up to 0.7 GPM (Gallons Per Minute).
- Certifications: NSF/ANSI Certified (42, 58, 372).
- Filter Lifespan: RO membrane lasts up to 36 months, PCF filter lasts up to 12 months.
- Smart Features: Wi-Fi connectivity, smart faucet with TDS monitoring, filter replacement alerts.
- Power: Requires an electrical outlet for the smart faucet.
How Does It Work?
You’re probably wondering, “How does this tankless system work, and is it as effective as the traditional ones?” Let’s break it down:
- Sediment Filter: The first stage of filtration. It removes larger particles like dirt, rust, and sand, ensuring the rest of the system works smoothly.
- Granular Activated Carbon Filter: This filter helps to absorb chlorine, pesticides, and other harmful chemicals, improving the taste and odor of your water.
- Carbon Block Filter: An additional layer of protection against chemicals and contaminants that could affect the taste of your water.
- Reverse Osmosis Membrane: Here’s where the magic happens. This membrane eliminates 99% of dissolved solids, including harmful contaminants like lead, mercury, arsenic, and fluoride. It’s the core of the system.
- Post-Carbon Filter: After the water passes through the RO membrane, the post-carbon filter ensures no remaining taste or odor.
- UV Sterilizer (Optional): Some models include a UV light that kills bacteria and viruses, making the water even safer.
- Alkaline Filter: This filter adds back essential minerals like calcium and magnesium, which are stripped during the filtration process. This helps balance the pH of the water and improve its taste.
- Remineralization: This filter restores more minerals to the water, enhancing its flavor and ensuring it’s healthy for your body.
- Final Polishing: A final stage to ensure the water is as pure and fresh as possible before it reaches your glass.
Key Features of the Mizudo Tankless RO System
Advanced Filtration System
Let’s start with what really matters—the filtration performance. The Mizudo Tankless RO System uses 9 stages of filtration to remove a vast range of contaminants. From heavy metals like lead and arsenic to chlorine, fluoride, and even PFAS (forever chemicals), this system covers it all.
What’s more impressive is the 0.0001-micron RO membrane, which can filter out particles as tiny as viruses and bacteria. It’s a level of filtration that ensures the purest water for drinking, cooking, and even washing fruits and vegetables. And trust me, after testing hundreds of systems, Mizudo stands out in terms of clarity.
Wi-Fi Control for Real-Time Monitoring
Being able to control and monitor your water system remotely? That’s a feature that sets the Mizudo Tankless RO System apart. The system comes with a smart faucet that displays real-time data on the water’s TDS (Total Dissolved Solids) levels and the filter status. You can also get notifications directly to your phone when it’s time to replace filters.
This means you won’t have to guess when it’s time for a filter change or wonder about your water’s purity.
Space-Saving Design
If you’re like me, space is a big deal. Traditional RO systems with bulky tanks take up a lot of room under your sink, which is a nightmare for those of us with cramped cabinets. The Mizudo Tankless RO System eliminates that problem. With its tankless design, you save up to 70% of cabinet space—an absolute win if you’re working with limited kitchen real estate.
High Flow Rate and Water Efficiency
Now, we all want fast, fresh water, right? The Mizudo Tankless RO System can produce up to 800 GPD (gallons per day)—that’s more than enough for a medium to large family. I’ve tested it, and I can confidently say that it’s incredibly fast. You’ll fill up an 8-ounce glass in about 4 seconds—no waiting around for water!
And the best part? Efficiency. The 3:1 pure-to-drain ratio ensures that for every three gallons of purified water, only one gallon of wastewater is produced. This is much better than older models that waste four or more gallons for every one gallon of clean water.
Design and Features
Compact and Modern Design
The tankless nature of the Mizudo RO System is what really sets it apart. Not only does it free up under-sink space, but it also fits neatly into smaller areas, making it ideal for apartments or smaller homes.
The smart faucet that comes with the system is sleek and easy to read. It’s not just for looks either; the faucet lets you monitor water quality, filter life, and more. It’s a small detail, but it makes a big difference when you’re trying to stay on top of your water system’s health.
Noise Reduction
One thing that’s often overlooked in water filtration systems is noise. The Mizudo Tankless RO System has a self-cleaning feature that involves flushing out contaminants automatically. While it’s generally quiet, you might notice a bit of noise when it’s doing its thing. But honestly, it’s no louder than a dishwasher running in the background.
Practical Use and Performance
So, does it work? Absolutely.
I tested the Mizudo Tankless RO System over a period of two weeks in a typical household setting. I had it running in the kitchen, and we used it for everything from drinking water to cooking. The flow rate is impressive – it can fill up a glass in just 4 seconds, which is way faster than a lot of the other systems I’ve tested. The water quality? Crystal clear, fresh, and with no aftertaste. I’ve used plenty of RO systems, and this one consistently provided the cleanest, best-tasting water.
The 3:1 pure-to-drain ratio is also a huge plus. While other systems can waste a lot of water, Mizudo is designed to conserve it, making it an eco-friendly option. That’s something we all need to consider in today’s world.
Customer Reviews and Experiences
I always recommend checking out real-world reviews before making a purchase, and the Mizudo Tankless RO System has earned some solid feedback. Users love how quickly it filters water and the convenience of the smart faucet. They also appreciate the long-lasting filters and the space-saving design.
However, some have noted the noise it produces during operation, especially in quieter kitchens. It’s not a deal-breaker, but it’s something to consider if you have a noise-sensitive environment.
MIZUDO Zero Stale Comparison with Other RO Systems
Now, let’s see how the Mizudo Tankless RO System compares to some of its competitors. For this, we’ll pit it against the Waterdrop G3P800 and the Frizzlife PD600:
| Feature | Mizudo Megaflo 1200GPD | Waterdrop G3P800 | Frizzlife PD600 |
|---|---|---|---|
| Capacity | 1200 GPD | 800 GPD | 600 GPD |
| Pure-to-Drain Ratio | 3:1 | 2:1 | 1.5:1 |
| Smart Features | Wi-Fi Control, Smart Faucet | Smart Faucet | Smart Faucet |
| Filtration Stages | 9 | 8 | 6 |
| Water Flow Rate | 1.45 GPM | 1.2 GPM | 0.5 GPM |
| Price | $849.99 | $500 | $400 |
What We Can Learn:
- Mizudo Megaflo offers the highest capacity at 1200 GPD, which is ideal for large families or businesses that require a lot of filtered water daily.
- Water Efficiency: The Mizudo Megaflo stands out with its 3:1 pure-to-drain ratio, wasting less water compared to its competitors.
- Smart Features: While Waterdrop G3P800 and Frizzlife PD600 also come with smart faucets, the Mizudo Megaflo offers a more advanced display with real-time TDS readings and filter alerts.
Test Score Card
Here’s my test scorecard for the Mizudo Tankless RO System:
| Ingredients | Score |
|---|---|
| Filtration Performance | 9/10 |
| Efficiency | 9.5/10 |
| Speed | 9/10 |
| Ease of Use | 9.5/10 |
| Value for Money | 8/10 (It’s on the pricier side, but you get what you pay for) |
FAQs About the Mizudo Tankless RO System
The RO membrane lasts 36 months, while the PCF filter needs replacement every 12 months.
Yes! The installation is straightforward. You’ll need to connect it to an electrical outlet for the smart faucet and hook it up to your cold water line.
Not at all. Thanks to its 3:1 pure-to-drain ratio, it wastes far less water than traditional systems.
While it’s not designed to be connected to refrigerators or ice makers, it works great as an under-sink filter for clean, filtered water.
Maintenance
Taking care of the Mizudo Tankless RO System is simple. The filter replacement is super easy with the quick-twist design. You’ll get alerts when it’s time to change filters, so you won’t have to worry about keeping track.
Additionally, the auto-flush feature ensures that the system stays clean and efficient, so you don’t have to worry about buildup over time.
Buy it If…
- You want a space-saving water filtration system that’s easy to install.
- You need a high-output system for a large family or small business.
- You care about water conservation and want a system that wastes less water.
Don’t Buy it If…
- You’re on a tight budget and can’t afford a higher-end system.
- You need something quieter – the noise might be a concern for some.
- You don’t need the advanced features like smart monitoring.
How I Tested
I tested the Mizudo Tankless RO System in my kitchen over the course of two weeks. Used it for drinking water, cooking, and even washing produce. I measured its flow rate, monitored water quality using the TDS display, and kept an eye on how easy it was to maintain.
Conclusion
The Mizudo Tankless RO System is a solid choice if you’re looking for high-quality, efficient, and space-saving water filtration. Its ability to filter large volumes of water quickly, combined with smart features and eco-friendly design, makes it stand out in the crowded market. Although it’s not the cheapest option, the long-lasting filters and high capacity justify the investment for many.
Suppose you want the peace of mind that comes with clean, fresh water every day, and you’re willing to pay a little extra for advanced features. In that case, the Mizudo Tankless RO System is definitely worth considering.
Buying Option: $849.99 at Amazon
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Engr. Hm Jamal is the founder of Wits Engineer and a home appliance and water systems specialist with over 13 years of hands-on experience in home improvement, electrical systems, and water treatment. He is an Electrical Engineering graduate from BUET and has worked across residential renovations, new home builds, and water system design, with a strong focus on safety, efficiency, and long-term reliability in real household environments. Jamal’s work centers on evaluating how appliances and filtration systems perform in everyday use, not just under ideal conditions. His reviews emphasize practical operation, maintenance demands, energy use, and potential safety limitations, helping readers avoid products that look good on paper but fail in long-term ownership. In addition to fieldwork, he shares his expertise through experience-based guides, technical training content, and educational talks, aimed at helping homeowners and professionals make informed, responsible decisions about water management and home systems. His approach blends engineering fundamentals with real-world usability, prioritizing solutions that remain effective, safe, and sensible years after purchase.
