When searching for an under sink reverse osmosis system, most buyers seek a reliable, high-capacity filtration solution that fits seamlessly under their kitchen sink. The iSpring RCC7-BN stands out as the best overall pick for its certifications and balanced performance, while the Waterdrop G3P800 offers impressive GPD and smart features for tech-savvy users. The main tradeoffs often involve balancing filtration quality, capacity, and ease of installation—higher-capacity models may require more space or higher initial investment. Continue reading for a detailed breakdown of these options and how to choose the best fit for your needs.
Key Takeaways
- The top-performing systems combine NSF/ANSI certification with high GPD for efficiency.
- Tankless models like Waterdrop G3P800 tend to save space but can be more expensive upfront.
- Remineralization features add taste and health benefits but often come at a higher cost.
- Ease of installation varies widely; some units are more user-friendly for DIY setup.
- Pricing reflects build quality, capacity, and included features like smart faucets or leak detectors.
| under sink reverse osmosis system | Flow Rate | Filtration Stages | Certification |
|---|---|---|---|
| iSpring RCC7-BN NSF Certified | 75 gallons per day | — | NSF/ANSI 58 |
| iSpring RCC7AK-BLK 6-Stage Rev | Variable, dependent on pressure | — | NSF/ANSI 58 |
| APEC Water ROES-50 5-Stage Und | 50 GPD | 5 | — |
| VIOMI Pure B6W 600GPD Under-Si | 600 GPD | 7 | — |
| Waterdrop G3P800 Reverse Osmos | — | 10 | NSF/ANSI 42, 53, 58, 372 |
| 5-Stage Reverse Osmosis System | — | 5 | WQA Gold Seal, NSF/ANSI 58 & 372 |
| Waterdrop T4-A Alkaline Minera | 450 GPD | 10 | — |
| Express Water 10-Stage Under S | 50 GPD | — | NSF |
| Waterdrop G5P700A Alkaline Min | 700 GPD | 8 | — |
| Purewell U01 Non-Electric Tank | 800 GPD | 7 | — |
| Waterdrop G5P500A Reverse Osmo | 500 GPD | 8 | NSF/ANSI 58 & 372 |
| Waterdrop G2P600 Under-Sink Re | 600 GPD | 7 | NSF/ANSI 372 |
| Waterdrop G3P600 Reverse Osmos | — | 8 | NSF/ANSI 42, 53, 58, 372 |
| iSpring RCC7AK-BN NSF Certifie | 75 GPD | — | NSF/ANSI 58 |
| Waterdrop T3-C RO Water Filtra | 450 GPD | 8 | NSF/ANSI 372 |
More Details on Our Top Picks
iSpring RCC7-BN NSF Certified 5-Stage Reverse Osmosis Water Filter System with Brushed Nickel Faucet
This model stands out for its ability to effectively eliminate over 1,000 contaminants, including lead, fluoride, and arsenic, making it ideal for those prioritizing thorough purification. Compared to the APEC ROES-50, it offers a higher flow rate of 75 GPD and a more durable, leak-free design, though it may require more under-sink space. Its NSF/ANSI 58 certification provides peace of mind about safety standards, and the included lead-free faucet ensures a sleek appearance. However, regular filter replacements are necessary to maintain performance, and installation, while straightforward, can be tight in limited spaces. Best for homeowners seeking reliable, bottled-quality water without added complexity.
Pros:- High flow rate of 75 GPD for large daily water needs
- Highly effective at removing over 1,000 contaminants
- Leak-free, durable, and easy to install
Cons:- Requires sufficient space under the sink for installation
- Periodic filter replacements needed every 6-12 months
Best for: Families or individuals needing high-capacity, long-term filtration with minimal maintenance
Not ideal for: Small kitchens with limited under-sink space or users seeking a compact, minimal-install system
- Capacity:75 GPD
- Faucet Material:Brushed Nickel
- Certification:NSF/ANSI 58
- Filter Stages:5
- Installation:Under sink
- Flow Rate:75 gallons per day
Our verdict“This is best suited for users who want reliable, high-capacity, bottled-quality water with straightforward installation.”
iSpring RCC7AK-BLK 6-Stage Reverse Osmosis System with Alkaline Remineralization and Black Faucet
This system excels by restoring alkalinity and essential minerals, offering a more natural taste compared to systems like the APEC ROES-50. Its 6-stage process reduces over 1,000 contaminants, including lead and arsenic, while adding beneficial minerals, making it a good choice for health-conscious users. The sleek black faucet adds a modern touch to your kitchen, and installation is straightforward with leak protection features. However, it requires under-sink space for the additional remineralization stage and regular filter changes, which can increase maintenance. This pick is ideal for those who want purified water with a balanced pH and improved flavor. Perfect for households seeking mineral-enhanced, clean drinking water.
Pros:- Restores natural alkalinity and minerals for better taste
- Reduces over 1,000 harmful contaminants effectively
- Stylish black faucet enhances kitchen aesthetics
Cons:- Requires space for additional remineralization stage
- Filter replacements every 6-12 months needed
Best for: Health-conscious families wanting mineral-rich, great-tasting water without complex setup
Not ideal for: Limited-space kitchens or users who prefer minimal maintenance and fewer filter changes
- Certification:NSF/ANSI 58
- Number of stages:6
- Remineralization:Yes
- Faucet color:Black
- Contaminant reduction:Up to 99%
- Flow Rate:Variable, dependent on pressure
Our verdict“Ideal for those who value mineral-rich, better-tasting water with straightforward installation and maintenance.”
APEC Water ROES-50 5-Stage Under Sink Reverse Osmosis System, 50 GPD
The APEC ROES-50 offers a solid balance of affordability and performance, producing up to 50 GPD of purified water. Its 5-stage filtration effectively removes arsenic, lead, fluoride, chlorine, and microplastics, matching the purification standards of higher-end models like the Waterdrop G3P800. Its quick-connect fittings make DIY installation accessible even for novices, though the lower flow rate and the need for regular filter replacements every 6 to 24 months can be drawbacks. Unlike the high-capacity tankless options, this system is better suited for households with moderate water needs. Best for budget-minded users prioritizing proven, quality filtration without bells and whistles.
Pros:- Affordable price point for effective filtration
- Easy to install with quick-connect fittings
- Includes all necessary components for setup
Cons:- Limited flow rate of 50 GPD
- Filters require replacement every 6-24 months, depending on use
Best for: Budget-conscious households seeking reliable, effective filtration with simple setup
Not ideal for: Large families or users wanting tankless, high-volume systems or advanced features
- Flow Rate:50 GPD
- Filtration Stages:5
- Certifications:NSF Certified 372 & 58
- Includes:Filter set, faucet, water tank, installation kit
- Installation:Under sink
- Filter Replacement:Every 6-24 months
Our verdict“This system suits users who want dependable, cost-effective filtration without advanced features or high capacity.”
VIOMI Pure B6W 600GPD Under-Sink Tankless Reverse Osmosis Water Filtration System
The VIOMI Pure B6W stands out with its impressive 600 GPD flow rate and tankless design, making it ideal for large households or commercial settings. Its 7-stage filtration process includes NSF/ANSI certifications for removal of lead, copper, PFAS, and other contaminants, surpassing many traditional tank-based systems like the Waterdrop G3P800 in capacity. Installation requires drilling and a dedicated outlet for the garbage disposer, which can be a barrier for some. Its compact dimensions and app control for monitoring filter life provide convenience, but the tubing isn’t included, requiring additional parts. This makes it better suited for users comfortable with more complex installation. Best for large families or commercial kitchens needing high flow and space efficiency.
Pros:- High flow rate of 600 GPD for instant access
- Compact, space-saving tankless design
- App control for monitoring filter status
Cons:- Requires drilling and dedicated outlet for installation
- Tubing not included, may need additional parts
Best for: Large households or commercial operators needing high-capacity, space-efficient filtration
Not ideal for: Small kitchens with limited space or users unwilling to do complex installation
- Flow Rate:600 GPD
- Filtration Stages:7
- Certifications:NSF/ANSI 42, 53, 58, 372
- Dimensions:12.64″L x 5.91″W x 16.22″H
- Water Ratio:2:1 pure-to-drain
- Material Safety Certification:NSF/ANSI 372
Our verdict“Perfect for users who need high-volume, space-efficient filtration with advanced monitoring capabilities.”
Waterdrop G3P800 Reverse Osmosis Water Filter, 800 GPD, Tankless RO System, NSF/ANSI Certified, 10-Stage Filtration, Smart LED Faucet
The Waterdrop G3P800 is an impressive tankless system with an 800 GPD capacity, making it ideal for large families or commercial use. Its 10-stage filtration system offers comprehensive removal of contaminants, including heavy metals, fluoride, and radioactive substances, outperforming many competitors like the iSpring RCC7-BN in capacity and filtration depth. The smart LED faucet provides real-time water quality data, a feature that appeals to tech-savvy users. Installation requires drilling two holes under the sink, which could be a hurdle for some. Its continuous flow and space-saving design make it suitable for busy households, but the LED lifespan of 50 years might be more than most users need to consider. Best for users wanting maximum capacity with smart features and space efficiency.
Pros:- Massive 800 GPD capacity for large-volume needs
- 10-stage filtration for broad contaminant removal
- Smart LED faucet displays real-time water quality data
Cons:- Installation requires drilling two holes
- LED lifespan may be longer than necessary for typical use
Best for: Large families or commercial environments needing high throughput and monitoring
Not ideal for: Small kitchens or users uncomfortable with more complex installation processes
- Capacity:800 gallons per day
- Filtration Stages:10
- Pure to Drain Ratio:3:1
- Certification:NSF/ANSI 42, 53, 58, 372
- Water Flow Rate:1 cup in 5 seconds
- LED Lifespan:50 years
Our verdict“This system is ideal for high-demand households seeking high capacity, detailed water monitoring, and space savings.”
5-Stage Reverse Osmosis System, Under Sink Water Filter with Lead-Free Faucet and Leak Detector
This 5-stage system stands out for its high safety standards, certified by WQA Gold Seal and NSF/ANSI 58 & 372, making it a solid choice for those prioritizing water purity and safety. Unlike the Waterdrop T4-A, which offers dual flow and space savings, this model provides a more comprehensive package with a leak detector and a lead-free faucet, ensuring peace of mind for long-term use. The tradeoff is that its installation requires under-sink space and potentially professional setup, especially for optimal performance. It’s ideal for households seeking certified, hassle-free filtration with reliable support and warranty coverage.
Pros:- Certified for high safety and performance standards
- Complete kit simplifies installation process
- Effective at reducing dissolved solids and contaminants
- Backed by a 1-year warranty and lifetime support
Cons:- Requires sufficient under-sink space for installation
- May need professional help for optimal setup
Best for: Families or individuals who want certified, all-in-one filtration with reliable support and are okay with a standard tank-based system
Not ideal for: Small kitchens with limited under-sink space or those preferring tankless setups, due to its bulk and installation needs
- Certification:WQA Gold Seal, NSF/ANSI 58 & 372
- Filtration Stages:5
- Includes:faucet, tank, filtration unit, tubing, installation kit, leak detector
- Suitable For:drinking, cooking, coffee, ice
- Warranty:1 year
- Support:lifetime
Our verdict“This system suits those who prioritize safety, certification, and a straightforward, all-in-one solution for drinking water.”
Waterdrop T4-A Alkaline Mineral Tankless Reverse Osmosis System, 10-Stage, 450 GPD, NSF/ANSI 372 Certified, Dual Flow, BPA Free
The Waterdrop T4-A’s tankless design and 10-stage filtration make it ideal for modern kitchens that value space and efficiency. Compared with the Purewell U01, which offers a higher flow rate and tankless operation, this model provides dual water options: standard RO and mineral-enhanced alkaline, appealing for health-conscious users. However, it requires an electrical connection and involves drilling for faucet installation, which can complicate setup. Its high flow rate of 450 GPD makes it suitable for busy households that need quick access to filtered water without secondary contamination concerns.
Pros:- Dual water flow options for standard and mineral-enhanced water
- Tankless design reduces secondary contamination
- High flow rate of 450 GPD for quick water access
- Compact, space-saving footprint
Cons:- Requires electrical power to operate
- Faucet installation involves drilling, which may be challenging
Best for: Homeowners seeking space-efficient, dual-function RO with mineral enhancement and modern features
Not ideal for: Users who lack electrical outlets near the sink or prefer plug-and-play systems, due to installation complexity
- Flow Rate:450 GPD
- Filtration Stages:10
- Pure to Drain Ratio:2:1
- Certifications:NSF/ANSI 372
- BPA Free:Yes
- Tankless:Yes
Our verdict“This pick appeals to those wanting a sleek, high-capacity system with mineral benefits and minimal secondary pollution concerns.”
Express Water 10-Stage Under Sink Reverse Osmosis Water Filtration System with Alkaline Filter, 50 GPD, NSF Certified, Chrome Faucet
This 10-stage system offers strong filtration, removing 99.99% of impurities including lead, fluoride, and arsenic, making it suitable for health-conscious households. Its alkaline filter enhances water with beneficial minerals, similar to the Waterdrop G5P700A, but at a lower flow rate of 50 GPD, which might be limiting for larger families. Its NSF certification guarantees quality, but the dimensions and filter replacements could pose challenges for those with tight under-sink spaces or limited DIY skills. It strikes a good balance between performance and cost, especially for those new to RO systems.
Pros:- Filters out 99.99% of common contaminants
- Includes an alkaline filter for mineral addition
- Easy to install and maintain with automatic tank filling
- NSF certified for quality assurance
Cons:- Limited flow rate of 50 GPD may slow filling in busy households
- Installation can be tricky for those unfamiliar with plumbing
Best for: Budget-conscious buyers needing high impurity removal and mineral enrichment for moderate water demands
Not ideal for: Large households or users requiring rapid water supply, due to its lower 50 GPD flow rate
- Number of stages:10
- Flow rate:50 GPD
- Certification:NSF
- Dimensions:17x15x5 inches
- Includes:Chrome faucet
Our verdict“This system provides reliable, certified filtration with mineral benefits at an affordable price for moderate use cases.”
Waterdrop G5P700A Alkaline Mineral Reverse Osmosis Water Filter, 700 GPD, NSF/ANSI Certified, 8-Stage System, Tankless with Smart LED Faucet
The Waterdrop G5P700A offers an impressive 700 GPD flow and 8-stage filtration, making it well-suited to large homes or commercial-style kitchens. Its tankless design and smart LED faucet deliver a sleek, modern look, unlike the Purewell U01, which is also tankless but offers a slightly lower capacity. The system’s ability to add minerals like calcium and magnesium enhances water taste and health benefits. The complexity of installation, including drilling for the faucet, could be a hurdle for some, but its high throughput and space-saving design make it a standout for busy environments.
Pros:- High flow rate of 700 GPD for instant access
- Enriches water with essential minerals for taste and health
- Tankless and space-efficient design
- Smart LED faucet for easy control
Cons:- More expensive than lower-capacity models
- Installation can be complex, requiring drilling and electrical hookup
Best for: Large households or commercial kitchens needing high-speed, mineral-enriched water with smart operation features
Not ideal for: Small kitchens or users with limited space or plumbing experience, due to installation and cost
- Filtration stages:8
- Flow rate:700 GPD
- Certifications:NSF/ANSI 58 & 372
- Minerals added:Ca²⁺, Mg²⁺, Na⁺, K⁺
- Design:Tankless
- Faucet dimensions:6.6″ L x 3.2″ W x 11.3″ H
Our verdict“This system is best suited for users demanding high capacity, mineral-rich water, and modern smart features in a space-efficient package.”
Purewell U01 Non-Electric Tankless Reverse Osmosis Water Filtration System
The Purewell U01 impresses with its 800 GPD flow rate and reliance solely on water pressure, making it an excellent choice for off-grid or energy-conscious homes. Compared to the Waterdrop G5P700A, which requires electrical power, this model operates silently and without electricity, appealing for those seeking a peaceful, eco-friendly setup. Its 3:1 pure to drain ratio enhances water efficiency, but dependence on consistent water pressure and the absence of included filters or accessories might complicate installation and ongoing maintenance. This system is perfect for large households with adequate water pressure and DIY skills.
Pros:- Zero electricity, noise-free operation
- High flow rate of 800 GPD for large demands
- Compact design saves space and reduces secondary pollution
- Real-time TDS display and pressure gauge for monitoring
Cons:- Dependent on consistent water pressure for optimal operation
- Requires basic plumbing knowledge for DIY installation
- No included replacement filters or accessories
Best for: Large households or off-grid users seeking high-volume, energy-free filtration with real-time monitoring
Not ideal for: Small kitchens or homes with low water pressure, as the system depends heavily on pressure to function properly
- Filtration Stages:7
- Flow Rate:800 GPD
- Pure-to-Drain Ratio:3:1
- Certifications:NSF 58
- Power:None (water pressure powered)
- Dimensions:5.7″L x 5.7″W x 16″H
Our verdict“This model works best for large households wanting a high-capacity, eco-friendly system without electricity requirements, assuming suitable water pressure.”
Waterdrop G5P500A Reverse Osmosis System, 8-Stage, Tankless, 500 GPD, Alkaline Mineral pH+
The Waterdrop G5P500A stands out for its combination of advanced 8-stage filtration and a tankless design, making it ideal for modern kitchens with limited space. Unlike traditional tank systems like the APEC Water ROES-50, this model offers a higher flow rate of 500 GPD, ensuring quick access to purified water without waiting. Its space-saving form factor is perfect for small under-sink areas, and the mineral enrichment enhances water taste and health. The main tradeoff is that installation involves drilling, which might be a hurdle for some DIYers, and the price is higher than simpler tank-based systems. Overall, this pick suits those who seek high capacity and sleek design without sacrificing performance.
Pros:- Advanced 8-stage filtration effectively removes contaminants
- Tankless design saves space and keeps kitchen counters clear
- High flow rate of 500 GPD for instant water access
- Enriches water with minerals for better taste and health
Cons:- Requires drilling for faucet installation, which may be complex
- Higher price point compared to traditional tank models
Best for: Homeowners with limited kitchen space who want high-volume, mineral-enriched water
Not ideal for: Renters or those unwilling to drill into cabinetry, as installation is more involved
- Filtration stages:8
- Flow rate:500 GPD
- Pure to drain ratio:2:1
- Dimensions:6.6″ L x 3.2″ W x 11.3″ H
- Certification:NSF/ANSI 58 & 372
Our verdict“This system is perfect for space-conscious households needing high capacity and mineral-enhanced water.”
Waterdrop G2P600 Under-Sink Reverse Osmosis System, 600 GPD Tankless Water Filter, 7-Stage NSF/ANSI 372 Certified
The Waterdrop G2P600 excels in delivering large volumes of filtered water, making it well-suited for big families or small commercial settings. Compared with the Waterdrop G3P600, it offers a slightly higher flow rate of 600 GPD and a 7-stage filtration process, emphasizing water efficiency with a 2:1 drain ratio. Its tankless design maximizes space and simplifies installation, but some users may find the plumbing setup requires prior knowledge, and the filter indicators need regular attention. This model is a smart choice for those prioritizing high output and water conservation.
Pros:- Impressive 600 GPD flow rate for large water demands
- Tankless, compact design maximizes under-sink space
- Water-efficient 2:1 drain ratio reduces waste
- Simple twist-and-pull filters for quick replacement
Cons:- Installation may be challenging without plumbing experience
- Filter replacement indicators require user attention
Best for: Large households or small businesses needing high-volume, water-efficient filtration
Not ideal for: Apartment dwellers or users unfamiliar with plumbing, due to installation complexity
- Flow Rate:600 GPD
- Filtration Stages:7
- Drain Ratio:2:1
- Installation Time:30 minutes
- Certification:NSF/ANSI 372
Our verdict“Ideal for busy households that need large quantities of clean water with minimal waste.”
Waterdrop G3P600 Reverse Osmosis System, 600 GPD Tankless RO Water Filter, NSF/ANSI Certified, 8-Stage Filtration, Smart LED Faucet
The Waterdrop G3P600 is distinguished by its integrated smart LED faucet, providing real-time data on water quality and filter status, a feature not found on simpler systems like the iSpring RCC7AK-BN. Its 8-stage filtration process ensures thorough contaminant removal while maintaining a 600 GPD capacity suited for large households. The tankless design saves space, and the low drain ratio improves water efficiency. However, it requires an electrical connection, which might limit placement options, and the faucet’s maximum flow rate could slow water delivery during peak use. This system is best for tech-savvy users who want detailed water data and high capacity.
Pros:- High capacity of 600 GPD supports large households
- Smart LED faucet displays real-time water quality and filter alerts
- Tankless, compact design maximizes space
- Efficient low drain ratio reduces water waste
Cons:- Requires electrical connection, limiting placement options
- Faucet flow rate may be slow during high demand
Best for: Families seeking high capacity combined with smart water monitoring features
Not ideal for: Users without electrical outlets under the sink or those preferring simple setups
- Capacity:600 GPD
- Filtration Stages:8
- Drain Ratio:2:1
- Dimensions:18.12″L x 5.67″W x 17.72″H
- Certification:NSF/ANSI 42, 53, 58, 372
Our verdict“Best suited for users who want a high-capacity, smart filtration system with space-saving design.”
iSpring RCC7AK-BN NSF Certified 75 GPD 6-Stage Reverse Osmosis System with pH+ Remineralization
The iSpring RCC7AK-BN offers a straightforward setup with its top-mounted filters and transparent housing, making it accessible for DIY beginners. Its 6-stage filtration not only removes common contaminants but also adds natural minerals and balances pH, improving taste over basic systems like the APEC ROES-50. While installation is easier than more complex models, it still requires some plumbing knowledge, and filter replacements are needed every six months to three years, adding ongoing maintenance. This system appeals most to those seeking reliable filtration with mineral enhancement without overwhelming complexity.
Pros:- Easy top-mounted installation suitable for DIY setup
- Remineralizes water for better taste and health benefits
- Transparent filters allow monitoring contaminant buildup
- NSF/ANSI 58 certified for reliable contaminant removal
Cons:- Limited flow rate of 75 GPD may be slow for larger families
- Ongoing filter replacement costs and intervals can be inconvenient
Best for: Homeowners new to water filtration or those wanting a simple, effective system with mineral benefits
Not ideal for: Users requiring high flow rates or large-volume output, due to its 75 GPD capacity
- Flow Rate:75 GPD
- Stages:6
- Certification:NSF/ANSI 58
- Remineralization:Yes
- Installation:Top-mounted, easy DIY
Our verdict“A reliable, beginner-friendly option that improves water flavor and health through remineralization.”
Waterdrop T3-C RO Water Filtration System, 8-Stage, NSF/ANSI 372 Certified, 450 GPD, Under-Sink, Auto-Flush, BPA-Free
The Waterdrop T3-C integrates advanced 8-stage filtration with eco-conscious features like auto-flush and a 2:1 pure-to-drain ratio, making it suitable for users who prioritize water conservation and flexible installation options. Compared to the G5P500A, it offers a slightly lower flow rate of 450 GPD but compensates with auto-flush technology that prolongs filter life and improves efficiency. Its ability to be mounted on the wall or under the sink provides versatility, though the need for electrical power may complicate installation in some spaces. This system is ideal for eco-minded households seeking a balance of high performance and sustainability.
Pros:- High flow rate of 450 GPD supports quick water access
- Auto-flush feature extends filter lifespan and conserves water
- Eco-friendly design with a 2:1 pure-to-drain ratio
- Flexible installation options (under-sink or wall-mounted)
Cons:- Requires electrical connection, which may limit placement
- No included faucet, requiring additional purchase
Best for: Environmentally conscious users wanting flexible installation options
Not ideal for: Small kitchens with limited space or users avoiding electrical setups
- Flow Rate:450 GPD
- Filtration Stages:8
- Pure-to-Drain Ratio:2:1
- Certification:NSF/ANSI 372
- Material:BPA-Free
Our verdict“Perfect for eco-aware households seeking a versatile, water-efficient RO system with auto-maintenance features.”
How We Picked
These products were evaluated based on their filtration performance, build quality, ease of installation, and overall value. I prioritized systems with NSF/ANSI certifications, which verify safety and filtration standards, and considered flow rates to ensure practical daily use. Durability and maintenance simplicity also played key roles, as well as user feedback on reliability. The ranking balances high-end features with affordability, aiming to recommend options suitable for different budgets and needs. Ultimately, the best systems deliver consistent water quality while minimizing hassle for the user.| under sink reverse osmosis system | Certification |
|---|---|
| iSpring RCC7-BN NSF Certified | NSF/ANSI 58 |
| iSpring RCC7AK-BLK 6-Stage Rev | NSF/ANSI 58 |
| APEC Water ROES-50 5-Stage Und | — |
| VIOMI Pure B6W 600GPD Under-Si | — |
| Waterdrop G3P800 Reverse Osmos | NSF/ANSI 42, 53, 58, 372 |
| 5-Stage Reverse Osmosis System | WQA Gold Seal, NSF/ANSI 58 & 372 |
| Waterdrop T4-A Alkaline Minera | — |
| Express Water 10-Stage Under S | NSF |
| Waterdrop G5P700A Alkaline Min | — |
| Purewell U01 Non-Electric Tank | — |
| Waterdrop G5P500A Reverse Osmo | NSF/ANSI 58 & 372 |
| Waterdrop G2P600 Under-Sink Re | NSF/ANSI 372 |
| Waterdrop G3P600 Reverse Osmos | NSF/ANSI 42, 53, 58, 372 |
| iSpring RCC7AK-BN NSF Certifie | NSF/ANSI 58 |
| Waterdrop T3-C RO Water Filtra | NSF/ANSI 372 |
