7 Best Space Saving Reverse Osmosis Systems in 2024
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Reverse osmosis systems are a marvel of modern technology.
Not everyone has the luxury of ample space to accommodate traditional systems.
That's where space-saving reverse osmosis systems come into play.
We’ll guide you through the best compact options available today.
Unstoppabl’s Top Picks
Waterdrop A1 Reverse Osmosis Hot Cold Water Dispenser: Provides hot and cold purified water instantly, making it a versatile addition to any kitchen
Waterdrop K19 Countertop Reverse Osmosis System: Perfect for those seeking a balance between efficiency and space-saving design. This system offers exceptional filtration without taking up precious counter space
Osmio Zero 2.0 Reverse Osmosis System: Renowned for its portability and ease of installation. Ideal for renters or anyone looking to purify water without permanent modifications
How we tested
We evaluated each system based on:
Filtration efficiency
Size
Capacity
Ease of installation
Additional features such as hot/cold water dispensing
User feedback on ease of use and maintenance was considered to provide a holistic view of each product's performance.
The Top Best Space-Saving Reverse Osmosis Systems
Waterdrop A1 Reverse Osmosis Hot Cold Water Dispenser
- Ideal for families seeking convenient access to water at different temperatures
- Certified against NSF/ANSI 372 for lead-free materials and has passed the SGS testing
- This RO system is passed official third-party laboratory (SGS) test according to NSF/ANSI 53&58&42&401 standard, effectively reduces 95.34% TDS, 99.5% Chrome, 97.38% Chromium, 99.53% Fluoride, 91.67% Arsenic, 99.69% Lead and PFAS, PFOA, PFOS, iron, radium, calcium, nitrate, chloride, and radioactive substances
- Equipped with a high-quality cooling system found in refrigerators, this water dispenser can deliver cold water as low as 41℉
- Its temperature adjustment range of 41℉-203℉ also makes it an excellent choice for making tea, coffee, or other beverages
- Installing this hot and cold water dispenser requires no drilling or plumbing. Just power it on, and it's ready to use
- The high pure-to-drain ratio of 2:1 makes it a water saver, and the separate feed water and wastewater design ensures efficient purification and prevents repeated filtration
- The night mode is the ideal low-noise and energy-efficient operational mode for homes or offices
The Waterdrop A1 offers instant access to hot and cold purified water.
This eliminates the need for a separate water cooler.
With a sleek design, it fits comfortably on any countertop.
The system boasts a 5-stage filtration process, ensuring your water is free from contaminants.
Pros:
Instant hot and cold water
Compact and stylish design
Superior 5-stage filtration
Cons:
Higher price point compared to standard systems
This is ideal for families and offices looking for convenience and efficiency in a compact form.
Waterdrop K19 Countertop Reverse Osmosis System
- Plug and play
- V-type heating technology
- 4-stage deep filtration
- Smart design
- Saving more (3:1 drain ratio)
The Waterdrop K19-S offers a 4-stage filtration process removing a range of contaminants.
Its tankless design means it takes up less space and provides fresh water on demand.
The installation process is straightforward, making it a great option for those who prefer a DIY approach.
Pros:
Tankless design saves space
Easy to install and maintain
Efficient 4-stage filtration
Cons:
Requires electricity to operate
Limited to countertop use
Perfect for apartment dwellers and small homeowners who value space and want a modern touch in their kitchen.
The need for an electrical outlet nearby and the system's countertop placement are crucial aspects to consider.
Osmio Zero 2.0 Reverse Osmosis System
- Priced at £445.00, includes Empty Filters for descaling and sanitizing and an Osmio Sanser Sanitising Spray 500ml until 31st March 2024
- No installation needed, portable and countertop design, suitable for up to 4 people
- Provides water at various temperatures: normal (approx. 25°C), warm (40°C - 50°C), hot (80°C - 88°C), and nearly boiling (90°C - 98°C)
- Energy-efficient, with 80% more efficiency than a regular kettle, and has a 1:5 pure to waste water ratio
- Offers a 3-year repair warranty for customers in mainland UK, with an optional 5-year extended warranty available
A portable system that moves easily, making it perfect for renters or those who frequently relocate.
Despite its compact size, it doesn't skimp on purification power, offering a 4-stage filtration process.
Pros:
Highly portable and easy to set up
Zero installation required
Efficient purification with 4-stage filtration
Cons:
Smaller water capacity than permanent systems
Requires more frequent filter changes due to compact size
This is perfect for anyone who needs a flexible, portable solution.
Osmio Fusion Installed Reverse Osmosis System
- Priced at £445.00, includes a free Osmio Sanser Sanitising Spray 500ml until 31st March 2024
- Designed for larger families (5+), offers ambient, warm, hot, and nearly boiling water
- Features include countertop installation, energy efficiency, and a ceramic heating element
- Provides a 3-year repair warranty for mainland UK, with an optional 5-year extended warranty
- Includes pre-installed filters with easy maintenance and an automatic shutdown mode for energy saving
Osmio Fusion is a sleek, under-the-sink system that saves space while providing high-quality water filtration.
It integrates seamlessly into your kitchen plumbing, offering a clutter-free look.
The system uses advanced filtration technology to remove impurities, ensuring every drop of water is pure and safe for drinking.
One of its standout features is the minimal maintenance required, making it a convenient choice for busy households.
Pros:
Space-efficient design
High-quality water filtration
Low maintenance
Cons:
Installation may require professional help
Higher initial cost due to its advanced features
This is ideal for homeowners looking for a permanent solution that doesn't compromise on space.
Consider the installation requirements and whether you're prepared for the initial investment for long-term benefits.
Waterdrop G3P600 Reverse Osmosis Water Filter
- Certified against nsf/ansi
- Tested by official third-party laboratory (sgs)
- Built with a smart display faucet
- Three filters included in the package
The Waterdrop G3P600 stands out for its superior filtration capacity and smart features.
It boasts a 7-stage filtration process, ensuring thorough purification and removal of contaminants.
This system is designed with a tankless design, saving more space and ensuring fresh water on demand.
Its smart LED panel displays filter life and TDS levels, making maintenance a breeze.
Pros:
Tankless design saves space
7-stage filtration for superior purification
Smart LED panel for easy monitoring
Cons:
Requires electricity to operate
Higher price point due to advanced features
This is perfect for tech-savvy individuals and families prioritizing water purity and space efficiency.
The need for an electrical outlet and the system’s advanced features justify the price.
AquaTru Classic Reverse Osmosis Waterfilter
- Certified NSF/ANSI standards
- No plumbing or installation required
- Cost-effective and environmentally friendly
- Quick change twist and seal filters
AquaTru Classic offers a countertop solution that doesn't skimp on purification power.
It's a plug-and-play system requiring no installation.
This makes it ideal for renters or those who move frequently.
Despite its compact size, it has a 4-stage filtration process to ensure clean, safe drinking water.
Its quick-change filter design simplifies maintenance, appealing to those seeking convenience.
Pros:
No installation required
Compact and portable
Easy maintenance with quick-change filters
Cons:
Limited water capacity
Countertop space required
This is best suited for individuals or small families living in apartments or homes with limited space.
LG Health Domestic Reverse Osmosis 4 stage system
- Water purifying device equipped with reverse osmosis filtration technology
- Eliminates all types of toxins: heavy metals, microplastics, fungicides, and pesticides
- Quick heating system with 6 different temperature levels
- Get healthy micro-filtered water instantly, at room temperature or between 45 and 100 ºC
- Child safety lock for hot water from 80°C
- Large capacity of up to 3 litres
The LG Health Domestic system offers a straightforward, efficient approach to water filtration with its 4-stage process.
Designed for under-sink installation, it's a great space-saver that doesn't compromise performance.
It's known for its durability and reliability, backed by LG's reputation for quality.
This system is an excellent choice for those seeking a balance between cost and effectiveness.
Pros:
Compact, under-sink design
Reliable and durable
Cost-effective solution
Cons:
Basic features compared to more advanced systems
Installation may require some plumbing skills
This is ideal for budget-conscious homeowners looking for a reliable, space-saving water filtration system.
Consider your ability to install the system or the need to hire a professional, and balance this with the cost savings the system offers.
How to choose the best space-saving reverse osmosis system
Quality should be your top priority.
A good system will remove contaminants effectively without frequent maintenance.
Look for systems with multiple filtration stages, ease of filter replacement, and those that fit your space requirements.
The price range for these systems can vary widely, from around $200 to $600, depending on their features and filtration capabilities.
Balance cost with quality.
Investing in a slightly more expensive system might offer better longevity and efficiency.
Always check online reviews and ratings to gauge the performance and reliability of the system you're considering.
Don't forget to look at warranty options and return policies.
These are important because they protect your investment and provide peace of mind.
A good warranty indicates the manufacturer's confidence in their product.
When making your decision…
Weigh all factors: your specific needs, budget, and quality of the system.
These factors will ensure you find the best space-saving reverse osmosis system.
Conclusion
- Ideal for families seeking convenient access to water at different temperatures
- Certified against NSF/ANSI 372 for lead-free materials and has passed the SGS testing
- This RO system is passed official third-party laboratory (SGS) test according to NSF/ANSI 53&58&42&401 standard, effectively reduces 95.34% TDS, 99.5% Chrome, 97.38% Chromium, 99.53% Fluoride, 91.67% Arsenic, 99.69% Lead and PFAS, PFOA, PFOS, iron, radium, calcium, nitrate, chloride, and radioactive substances
- Equipped with a high-quality cooling system found in refrigerators, this water dispenser can deliver cold water as low as 41℉
- Its temperature adjustment range of 41℉-203℉ also makes it an excellent choice for making tea, coffee, or other beverages
- Installing this hot and cold water dispenser requires no drilling or plumbing. Just power it on, and it's ready to use
- The high pure-to-drain ratio of 2:1 makes it a water saver, and the separate feed water and wastewater design ensures efficient purification and prevents repeated filtration
- The night mode is the ideal low-noise and energy-efficient operational mode for homes or offices
The options highlighted in this article represent the best on the market.
Consider your specific needs and preferences as you explore these top picks.
Try out one of the recommended products today and enjoy the taste of purified water.
Frequently Asked Questions
How much space does a reverse osmosis system need?
The space required for a reverse osmosis system can vary depending on the model.
Most under-sink systems need a space of at least 18 inches in height and 12 inches in width.
Countertop models, however, only require enough space on your counter to sit comfortably.
Always check the dimensions of the system before purchasing to ensure it fits your available space.
Is there anything better than reverse osmosis?
Reverse osmosis is one of the most effective methods for purifying drinking water.
They’re capable of removing up to 99% of contaminants.
Other filtration methods exist, such as activated carbon or UV light filters, but they typically do not offer the same level of purification.
For those seeking the purest water possible, reverse osmosis remains the best option.
What are the downsides of reverse osmosis?
The downsides of reverse osmosis include the initial cost of the system, the need for periodic filter changes, and the fact that it can waste water.
Reverse osmosis systems also remove some beneficial minerals from the water, which may need to be reintroduced for optimal health benefits.
However, for many, the advantages of purified water outweigh these considerations.
Do I need an air gap for my reverse osmosis system?
Yes, you typically need an air gap for a reverse osmosis system if it's connected to your home's sewage system.
An air gap prevents contaminated water from flowing back into the reverse osmosis system in the event of a sewage backup, ensuring your drinking water remains uncontaminated.
Some modern systems come with built-in air gaps, while others may require an external air gap to be installed.
How do you size a whole house reverse osmosis system?
Consider the peak flow rate.
This is the maximum amount of water your household uses during peak demand.
This can be calculated by adding the flow rates of all fixtures and appliances that may use water simultaneously.
A typical home might require a system that can handle 10-20 gallons per minute to ensure adequate water pressure and supply.
Are RO systems hard to install?
The difficulty of installing a reverse osmosis system can vary.
Under-sink models may require some plumbing knowledge for installation, but many are designed for DIY installation with detailed instructions provided.
Countertop models are generally easier to install, requiring no tools or plumbing modifications.
Not comfortable installing the system yourself? professional installation is always an option.
