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Home » Reverse Osmosis Systems » RKIN U1 Countertop Filter Review 

RKIN U1 Countertop Filter Review 

By: David Trinh
Last Updated:
Our Review

Advanced Filtration Technology5

Space-Saving Design4

Zero Installation Required5

Overall Rating



  • Advanced Filtration Technology
  • Space-Saving Design
  • Zero Installation Required
  • Re-Mineralization for Improved Taste
  • Long Filter Lifespan


  • Initial Cost: Higher upfront investment compared to other countertop filters
  • Size and Weight: May not be highly portable for frequent movers
  • Complexity in Filter Replacement: Replacing filters may require professional assistance

The RKIN U1 Countertop Filter represents a significant advancement in water purification technology. Designed for ease of use and efficiency, it offers a comprehensive solution for transforming tap water into cleaner, healthier drinking water.

RKIN U1 Countertop Filter Specs and Features

RKIN u1 filter in black
DimensionsThe space-saving design boasts a compact size of W 9.5”, H 17”, D 19” making it great for small spaces like apartments, condos, and RVs.
CapacityDesigned for countertop use, the 1/2 gallon tank capacity is suitable for daily household needs.
Filter SystemThe advanced 5-stage filtration system allows the system to effectively purify and remove contaminants.
Membrane TechnologyThe system utilizes a sediment filter, activated carbon filter, reverse osmosis membrane filter, alkaline post-filter, and hydrogen infusion filtration.
Filter LifespanReplace the filters following this schedule: sediment and carbon filter: every 6-12 months; reverse osmosis membrane: 12-24 months; alkaline post filter: 6-12 months; hydrogen filter: 6-12 months.
Contaminant RemovalThe RKIN U1 is capable of removing up to 99% of all contaminants, including fluoride, chlorine, and heavy metals like lead. It is also known for the reduction of TDS, PFOA/PFOS, hexavalent chromium, and trivalent chromium.
Installation OptionsThe system offers a zero-installation process, making it easy to set up and use without the need for complex installation processes.
DisplayThe system includes an intelligent touch control panel, which displays the status of the filter and other relevant information, including: active filtering, refill supply tank, water temp, volume, hydrogen content, TDS, water cooler, filter life, fresh water refill, and system errors.
WarrantyEnjoy an unconditional 1-year satisfaction guarantee with 1-year extended warranty available at additional cost ($59.99).
RemineralizationThe system includes a polishing alkaline post-filter that adds beneficial minerals back into the water.

The RKIN U1 Countertop Filter stands out for its advanced filtration technology and user-friendly design. 

One of its most notable features is the five-stage filtration system, which includes reverse osmosis technology, ensuring the removal of up to 99% of all contaminants, including harmful elements like Fluoride, Chlorine, and heavy metals. This makes it an excellent choice for households seeking pure, safe drinking water. 

The inclusion of a polishing Alkaline post-filter for re-mineralization ensures that the water is not only clean but also enriched with beneficial minerals, balancing the pH and improving the taste. 

These standout features make the RKIN U1 Countertop Filter a top choice for those prioritizing health, convenience, and efficiency in their water filtration system.

RKIN U1 Countertop Filter Review 

The RKIN U1 Countertop Filter is a modern, efficient water filtration system designed to provide high-quality drinking water. It combines advanced filtration technologies with a user-friendly design, making it a popular choice for households looking for a reliable water purification solution.


The RKIN U1 boasts a sleek, compact design that fits well in any kitchen setting. Its space-saving dimensions of W 9.5”, H 17”, D 19”  are ideal for small countertops, and its modern aesthetic complements contemporary kitchen appliances. 

The intelligent touch control panel adds a touch of sophistication and ease of use.


This system utilizes a five-stage filtration process, including reverse osmosis, UV, and hydrogen technologies. This comprehensive approach ensures a high level of purification, effectively removing a wide range of contaminants from tap water.

Contaminants Removed

The RKIN U1 is capable of removing up to 99% of all contaminants. This includes common pollutants such as Fluoride, Chlorine, and heavy metals like lead, ensuring that the water is safe and clean for consumption.

The U1 has been 3rd party tested for the reduction of contaminants. You can find details of these reports here.

Filter Lifespan/Maintenance

The system is known for having an extensive filter lifespan. To maintain optimal performance, replace the filters following this schedule: 

  • Sediment and carbon filter: every 6-12 months
  • Reverse osmosis membrane: 12-24 months
  • Alkaline post filter: 6-12 months
  • Hydrogen filter: 6-12 months

Warranty and Customer Service 

Customers can enjoy an unconditional 1-year satisfaction guarantee. For those looking for additional support, RKIN offers a 1-year extended warranty available at an additional cost  of $59.99.

Those who have had to contact customer service mention that they always offer friendly and helpful advice. 


One of the key features of the RKIN U1 is its zero-installation design. This makes it incredibly easy to set up and start using, with no need for complex plumbing or professional assistance.

What’s Included 

Each purchase of an RKIN U1 Countertop Filter system includes:

  • U1 system
  • Filters and reverse osmosis membrane pre-installed
  • Removable magnetic water drip tray
  • System manual

What We Like About the RKIN U1 Countertop Filter (Pros)

  • Advanced Filtration Technology: The RKIN U1 employs a sophisticated five-stage filtration process, including reverse osmosis and UV purification. This technology ensures the removal of up to 99% of contaminants, providing exceptionally clean and safe drinking water.
  • Space-Saving Design: Ideal for small kitchens or limited countertop space, the RKIN U1’s compact design is a significant advantage. It fits comfortably in most kitchen spaces without cluttering the area, making it a practical choice for apartments and smaller homes.
  • Zero Installation Required: The filter’s design eliminates the need for complex installation processes. This feature is particularly beneficial for renters or those who prefer a portable water filtration solution, as it can be easily set up and used without any plumbing modifications.
  • Re-Mineralization for Improved Taste: After the rigorous filtration process, the RKIN U1 adds essential minerals back into the water. This re-mineralization not only enhances the water’s taste but also ensures that it is balanced in pH, making it healthier and more enjoyable to drink.
  • Long Filter Lifespan: The RKIN U1 is designed for longevity, with filters that require less frequent changes compared to many other systems. This reduces ongoing maintenance costs and effort, making it a convenient and cost-effective solution in the long term.
  • User-Friendly Interface: The system features an intelligent touch control panel, which makes operating the filter straightforward and hassle-free. This user-friendly interface allows easy monitoring of the system’s status and simplifies the process of changing settings or filters.

What We Don’t Like About the RKIN U1 Countertop Filter (Cons)

  • Initial Cost: While the RKIN U1 offers long-term savings due to its durable filters, the initial cost of the unit might be higher compared to other countertop filters. This upfront investment can be a deterrent for those on a tight budget.
  • Size and Weight for Portability: Despite its space-saving design, the size and weight of the unit might still be a concern for those who frequently move or need a highly portable water filtration system. It may not be the most convenient option for people who require a lightweight and easily transportable filter.
  • Complexity in Filter Replacement: While the filter offers a long lifespan, replacing it might be more complex compared to simpler filtration systems. Users who are not comfortable with DIY tasks may find the process challenging and might need professional assistance.
  • No Hot Water Filtration: The RKIN U1 is designed exclusively for cold water filtration. This limitation means it cannot be used to filter hot water, which might be a drawback for users who need a versatile system capable of handling both hot and cold water filtration.

Final Thoughts

The RKIN U1 Countertop Filter emerges as a robust and efficient water filtration solution, particularly suited for those prioritizing purity and ease of use. Its advanced five-stage filtration system, including reverse osmosis and UV purification, ensures the removal of a wide range of contaminants, providing safe and clean drinking water. 

The filter’s space-saving design, long filter lifespan, and user-friendly interface make it an attractive option for various household settings. 

While the initial cost and limitations like the inability to filter hot water may be considerations for some, the overall functionality and performance of the RKIN U1 make it a commendable choice for anyone seeking a reliable and effective countertop water filter.

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David Trinh
David is an expert in all things plumbing, heating, cooling, and water treatment. He got his start in the plumbing business working on fixing all types of home improvement issues including water leaks, broken toilets, appliance installation, and more. Over time, he learned a ton about installing and choosing the correct water treatment products for homeowners.

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