Finding the best under sink water filter for apartments involves balancing performance, ease of installation, and size. The Waterdrop UL12A stands out as the best overall choice thanks to its reliable filtration and user-friendly features. For those seeking ultra-filtration, the Waterdrop WD-TSA-UF offers impressive micron-level purity, while the iSpring RCC7AK-BN provides comprehensive reverse osmosis with mineralization. The main tradeoffs include filter lifespan, installation complexity, and cost. Continue reading for a detailed comparison to help you choose the right fit.
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Key Takeaways
- The top models combine high filtration capacity with straightforward installation suited for apartment kitchens.
- Ultra-filtration and reverse osmosis systems offer the best contaminant removal but tend to be larger and more expensive.
- Longer filter lives reduce maintenance but may come at a higher upfront cost.
- Certification standards like NSF/ANSI ensure reliable contaminant reduction, making them a key decision factor.
- Compact design and included faucet options are important for maximizing space and convenience in apartment setups.
| under sink water filter for apartment | Flow Rate | Certification | Installation |
|---|---|---|---|
| Waterdrop UL12A Under Sink Wat | 5.026 L/min | NSF/ANSI 42 & 372 | — |
| Waterdrop WD-TSA-UF 0.01 μm Ul | — | — | Twist-and-lock, push-to-connect |
| iSpring RCC7AK-BN NSF Certifie | 75 GPD | NSF/ANSI 58 | Top-mounted |
| Waterdrop TSU 0.01 Micron Ultr | 1.05 GPM | NSF/ANSI 372 | — |
| Amazon Basics Under Sink Water | — | NSF/ANSI 42 & 372 | Twist-and-lock |
| Frizzlife Under Sink Water Fil | fills a cup in 3 seconds | NSF/ANSI 42, 53, 372 | DIY, less than 15 minutes |
| Waterdrop 15UA Under Sink Wate | 0.75 gpm at 60 psi | — | Push-to-connect fittings |
| Waterdrop 15UB Under Sink Wate | 0.75 gpm at 60 psi (full flow), 1.33 GPM at outlet | NSF/ANSI 372, 42, 53 | Connects to cold water, takes less than 3 minutes |
| CuZn UC-200 Under Sink Water F | — | NSF/ANSI 42 & 372 | — |
| ICEPURE Under Sink Water Filte | — | — | — |
| Waterdrop 15UB-UF 0.01 μm Ultr | 0.75 gpm at 60 psi | — | Under sink, requires drilling if no existing hole |
More Details on Our Top Picks
Waterdrop UL12A Under Sink Water Filter, Upgraded for 10UA, Time Reminder
This option stands out for its ability to effectively reduce a wide range of contaminants including PFAS, lead, chlorine, and heavy metals, making it ideal for those concerned about water safety. Its no-drill, freestanding design with suction cups simplifies installation, especially in apartments where permanent modifications are discouraged, setting it apart from systems like the Waterdrop WD-TSA-UF, which requires countertop mounting. The smart filter life reminder adds convenience, though its limited focus on cold water and absence of TDS reduction means minerals stay in the water, which isn’t ideal for those seeking mineral removal or remineralization. This pick makes the most sense for apartment dwellers who prioritize contaminant removal and easy setup without permanent fixtures.
Pros:- Effective removal of PFAS, lead, chlorine, and heavy metals
- No-drill, freestanding design with suction cup stability
- Smart filter life indicator with alert system
- Supports large water volumes with high flow rate
Cons:- Does not reduce TDS, so beneficial minerals remain in water
- Limited to cold water sources only
- Activated carbon from coconut shells may cause allergies in sensitive individuals
Best for: Renters or apartment residents needing a reliable, high-capacity filter with no permanent installation
Not ideal for: Homeowners with well water or those wanting mineral removal, as it doesn’t reduce TDS or add minerals
- Filter Capacity:11,000 gallons
- Lifespan:12 months
- Flow Rate:5.026 L/min
- Material:BPA-free, lead-free
- Certification:NSF/ANSI 42 & 372
- Compatibility:3/8″ line, 3/8″-1/2″ converter
Our verdict“Best suited for apartment renters seeking a high-capacity, no-drill solution for contaminant removal.”
Waterdrop WD-TSA-UF 0.01 μm Ultra Filtration Under Sink Water Filter System
This system excels for those who prefer a straightforward DIY setup with durable, leak-free parts. Its 9-stage ultrafiltration with a 0.01 μm pore size effectively removes chlorine, heavy metals, sediment, and unpleasant odors, rivaling the Waterdrop TSU 0.01 Micron in contaminant removal but with added filters for taste and odor. Compared to reverse osmosis systems like the iSpring RCC7AK-BN, it offers easier maintenance and no wastewater, though it doesn’t significantly lower TDS or add minerals. Its manual filter replacement every 6-12 months may be minor for some, but could be a hassle for others seeking minimal upkeep. This makes it ideal for those wanting effective filtration without complex installation or ongoing costs.
Pros:- Easy twist-and-lock installation with quick-connect fittings
- Long-lasting filters needing less frequent replacement
- Effective at removing chlorine, heavy metals, sediment, and odors
- Leak-proof, high-quality construction
Cons:- Does not significantly reduce TDS levels
- Requires manual filter changes every few months
- Limited to municipal cold water sources only
Best for: Apartment dwellers seeking a durable, easy-to-maintain system with excellent contaminant reduction
Not ideal for: Households needing TDS reduction or mineral infusion, or those who prefer hot water filtration
- Filtration Technology:9-stage ultrafiltration
- Filter Pore Size:0.01 μm
- Compatible Water Type:Municipal cold water
- Filter Lifespan:Up to 12 months
- Installation:Twist-and-lock, push-to-connect
- Material:High-quality plastics
Our verdict“A solid choice for apartment residents wanting reliable, low-maintenance ultrafiltration without the complexity of RO systems.”
iSpring RCC7AK-BN NSF Certified 75 GPD 6-Stage Reverse Osmosis Water Filter System with pH+ Remineralization
This reverse osmosis system makes sense for those who want thorough contaminant removal combined with mineral support. Its 6-stage design, certified by NSF/ANSI 58, effectively reduces a broad range of pollutants, while the remineralization stage restores essential minerals and balances water pH, setting it apart from simpler filtration units like the Amazon Basics. Installation can be more involved, and the bulkier design may require under-sink space, which could be a limitation in smaller apartments. Filter replacements tend to be pricier over time, but the result is cleaner, mineralized water with a better taste. This option is best for those willing to handle a more complex system for superior purity and mineral content.
Pros:- Remineralizes water with natural minerals and balanced pH
- Easy top-mounted installation from above
- Transparent filter housing for quick monitoring
- NSF/ANSI 58 certified for broad contaminant reduction
Cons:- Installation may require some plumbing skills
- Filter replacements can be costly
- Bulkier design needs more space under sink
Best for: Those seeking comprehensive filtration with added minerals and balanced pH, especially in small spaces with some plumbing experience
Not ideal for: Renters who prefer simple, non-RO solutions or have limited space for bulky systems
- Flow Rate:75 GPD
- Certification:NSF/ANSI 58
- Stages:6
- Remineralization:Yes
- Installation:Top-mounted
- Filter Life:Up to 2 years
Our verdict“Ideal for apartment residents wanting advanced purification with mineral support, accepting some installation complexity.”
Waterdrop TSU 0.01 Micron Ultra Filtration Under Sink Water Filter System
This system is ideal for apartments where space is limited but effective filtration remains a priority. Its 3-stage ultrafiltration with a 0.01 micron pore size removes chlorine, PFAS, heavy metals, and other contaminants while retaining essential minerals, similar to the larger ultrafiltration units like the Waterdrop WD-TSA-UF. Its compact dimensions and included stylish faucet make it suitable for smaller under-sink areas, though it requires countertop drilling for installation and isn’t compatible with hot water or well water sources. The long-lasting filters and clear indicator lights simplify maintenance, making it a practical choice for renters wanting clean, tasty water without sacrificing space.
Pros:- Compact design fits small kitchen spaces
- Effective ultrafiltration reduces contaminants and improves taste
- Long-lasting filters with simple replacement
- Includes a stylish, durable faucet
Cons:- Requires countertop drilling for installation
- Limited to municipal cold water only
- Does not reduce TDS or add minerals
Best for: Apartment residents with limited space seeking effective filtration with easy maintenance
Not ideal for: Homeowners with well water or those needing hot water filtration and TDS reduction
- Filtration Micron:0.01 micron
- Flow Rate:1.05 GPM
- Lifespan:Up to 24 months
- Dimensions:4.68″W x 13.97″H x 14.81″L
- Faucet Material:Brushed nickel
- Certification:NSF/ANSI 372
Our verdict“Perfect for small apartments needing effective, space-saving filtration with minimal maintenance.”
Amazon Basics Under Sink Water Filter System, NSF/ANSI 42 & 372 Certified, 11,000 Gallons, 1 Year Service Life
This system appeals to budget-conscious renters who want a straightforward, reliable filter. Its twist-and-lock design allows for quick installation, comparable to the Waterdrop UL12A, but with a simpler setup. The 11,000-gallon capacity and one-year service life ensure long-term use with minimal fuss, although it limits users to municipal cold water sources, similar to the Waterdrop TSU. While it effectively reduces chlorine, taste, and odor, it doesn’t target heavy metals or PFAS, making it less comprehensive. This product is suitable for those prioritizing affordability and ease of installation over advanced contaminant removal or remineralization.
Pros:- Easy twist-and-lock installation
- High capacity of 11,000 gallons or 1 year
- Effectively reduces chlorine, bad taste, and odor
- Affordable price point
Cons:- Limited to cold-water municipal sources
- Does not reduce TDS or remove heavy metals
- Requires replacement after a year or capacity limit
Best for: Renters or small households seeking a cost-effective, high-capacity filter for municipal water
Not ideal for: Homeowners with well water or those needing broad contaminant removal beyond chlorine and odor
- Certification:NSF/ANSI 42 & 372
- Capacity:11,000 gallons
- Service Life:1 year
- Installation:Twist-and-lock
- Connection Type:3/8″ line
- Material:Plastic
Our verdict“A practical, budget-friendly choice for renters needing simple, high-capacity municipal water filtration.”
Frizzlife Under Sink Water Filter System, NSF/ANSI 53&42&372 Certified, 8 Layer 0.5 Micron Filtration, Reduces Lead, Chloramine, PFOA/PFOS, Chlorine, Odor, and Taste
The Frizzlife SK99 stands out for its 8-layer, 0.5 micron filtration that effectively reduces common contaminants like lead, chlorine, and odors, surpassing basic filters like the Amazon Basics model which lacks multi-layer filtration. Its fast flow rate fills a cup in just 3 seconds, making it ideal for busy households. Compared to the Waterdrop 15UA, it offers DIY installation with less space required and a more eco-friendly filter cartridge design, though it doesn’t reduce TDS levels and needs a separate kit for refrigerator connection. This pick is perfect for those wanting high filtration accuracy without complicated setup or excessive waste.
Pros:- High 8-layer filtration for comprehensive contaminant removal
- Fast flow rate enhances convenience
- Eco-friendly design with replaceable cartridges
- Certified safe and effective for multiple contaminants
Cons:- Does not reduce TDS levels, limiting mineral retention
- Requires a separate kit for refrigerator water supply
- Internal testing capacity verification is limited
Best for: Homeowners seeking reliable, multi-stage filtration with straightforward DIY installation
Not ideal for: Households needing TDS reduction or a combined refrigerator and sink filter setup
- Certification:NSF/ANSI 42, 53, 372
- Filtration Micron:0.5 micron
- Layers:8
- Flow Rate:fills a cup in 3 seconds
- Installation:DIY, less than 15 minutes
- Compatibility:Serves sink and refrigerator with ice maker kit IMC-2
Our verdict“This system is ideal for users wanting a high-performance, easy-to-install under sink filter with broad contaminant reduction.”
Waterdrop 15UA Under Sink Water Filter System, 19,000 Gallons, 2 Years
The Waterdrop 15UA excels with its impressive 19,000-gallon capacity, making it especially suitable for households wanting long-term, low-maintenance filtration. It effectively reduces lead, chlorine, PFAS, and heavy metals, comparable to the ICEPURE system but with a longer service life of two years. Its straightforward push-to-connect fittings simplify DIY installation, though it’s limited to cold municipal tap water and larger size might require sink space verification. Unlike CuZn UC-200, which offers a 5-year lifespan, the 15UA’s extended capacity reduces filter replacement frequency at the cost of a bulkier form factor. Overall, it’s ideal for users prioritizing long-term savings and durable performance.
Pros:- Large capacity of 19,000 gallons for extended use
- Effective contaminant reduction including PFAS
- Simple push-to-connect installation
- Certified for safety and performance
Cons:- Size may require space clearance under sink
- Limited to cold municipal water only
- Activated carbon from coconut shells could trigger allergies
Best for: Families seeking a low-maintenance, long-lasting filter for city tap water
Not ideal for: Households with well water or those needing hot water filtration, due to its municipal cold water restriction
- Capacity:19,000 gallons
- Service Life:24 months
- Flow Rate:0.75 gpm at 60 psi
- Filtration Certifications:NSF/ANSI 42, 53, 372
- Materials:BPA-free, lead-free activated carbon
- Installation:Push-to-connect fittings
Our verdict“This model is best for users wanting a durable, long-term solution with minimal upkeep for city tap water.”
Waterdrop 15UB Under Sink Water Filter System with Dedicated Faucet
The Waterdrop 15UB distinguishes itself with a dedicated lead-free stainless steel faucet and multistage filtration that effectively reduces chlorine, heavy metals, and PFAS, making it a clear choice over simpler single-stage filters like the Amazon Basics model. Its quick, tool-free installation takes less than 3 minutes, and it maintains essential minerals, promoting healthy drinking water. However, it’s only compatible with cold water and the flow rate can vary with pressure, potentially impacting usage in homes with low water pressure. Unlike the 15UA, the 15UB’s dedicated faucet offers convenience but adds to the initial cost and setup complexity.
Pros:- Dedicated stainless steel faucet for convenience
- Effective multistage filtration for harmful contaminants
- Quick, easy installation
- Maintains essential minerals for health benefits
Cons:- Limited to cold water sources
- Flow rate may fluctuate depending on water pressure
- Higher initial setup cost due to dedicated faucet
Best for: Households wanting a dedicated, mineral-preserving filtration system with a separate faucet
Not ideal for: Users seeking a multi-purpose filter for both hot and cold water or with limited sink space
- Filter Type:Multistage with activated carbon block
- Certification:NSF/ANSI 372, 42, 53
- Flow Rate:0.75 gpm at 60 psi (full flow), 1.33 GPM at outlet
- Material:BPA-free, lead-free stainless steel faucet
- Installation:Connects to cold water, takes less than 3 minutes
- Maximum Faucet Flow Rate:1.7 gpm
Our verdict“This system suits users who prefer a dedicated faucet and mineral-rich water, with minimal installation fuss.”
CuZn UC-200 Under Sink Water Filter, NSF/ANSI 42 & 372, 5-Year Filter Life
The CuZn UC-200 offers an exceptional 5-year lifespan, making it a standout choice for those prioritizing long-term savings and minimal maintenance. Its multi-stage filtration reduces lead, PFAs, and chlorine effectively, comparable to the ICEPURE system but with a longer filter life, which minimizes replacement frequency. It’s straightforward to install, with all necessary parts included, and no complicated setup required. However, it doesn’t reduce TDS, so mineral content may not be retained for those seeking mineral-rich water. This filter is best suited for users who want a hassle-free, durable solution for municipal tap water without frequent replacements.
Pros:- Long 5-year filter life reduces replacement costs
- Effective at removing lead, PFAs, and chlorine
- Easy DIY installation with all parts included
- No complex maintenance required
Cons:- Does not reduce TDS, affecting mineral content
- Limited to faucet water, not suitable for well or hot water
- No filtration for other water sources
Best for: Cost-conscious households wanting a long-lasting, low-maintenance filter
Not ideal for: Users needing TDS reduction or filtering well water, as it’s limited to tap water
- Model Number:UC-200
- Brand:CuZn
- Filter Life:5 years
- Certification:NSF/ANSI 42 & 372
- Included Components:Stainless Steel Connection Hose
- UPC:804087020247
Our verdict“This filter is ideal for budget-conscious households seeking a durable, low-touch filtration solution for municipal tap water.”
ICEPURE Under Sink Water Filter System, NSF/ANSI 42 & 372 Certified, 3-Year/22,000 Gallon Capacity, Removes Heavy Metals and Chlorine, Easy Installation
The ICEPURE Under Sink System offers a generous capacity of 22,000 gallons and a flow rate of 2.5 GPM, making it well-suited for households with higher water demands. Its plug-and-play design simplifies installation, comparable to the Waterdrop 15UA but with a focus on higher flow and capacity. It effectively reduces heavy metals, chlorine, and odors, providing good-tasting water over three years. However, it’s only compatible with cold water and connections are limited to 1/2″ or 3/8″ Female NPT, which could be restrictive in some setups. This model is best for users requiring volume and flow efficiency without the complexity of advanced filtration stages.
Pros:- High flow rate of 2.5 GPM for large volume needs
- Long-lasting capacity of 22,000 gallons
- Easy quick-install design
- Certified to reduce heavy metals, chlorine, and odors
Cons:- Limited to cold water only
- Connection types limited to 1/2″ or 3/8″ Female NPT
- No advanced multi-stage filtration or mineral retention
Best for: Large households or those with higher water usage needing reliable, high-capacity filtration
Not ideal for: Small households or users seeking multi-stage or mineral-preserving filters, as it focuses on basic contaminant removal
Our verdict“This filter is suited for households prioritizing high flow and capacity over multi-stage filtration complexity.”
Waterdrop 15UB-UF 0.01 μm Ultra Filtration Under Sink Water Filter System
The Waterdrop 15UB-UF stands out for its comprehensive multistage filtration, effectively reducing chlorine, heavy metals, sediment, and odors, making it a top choice for those seeking consistently clean, good-tasting water. Compared with the Waterdrop UL12A, it offers superior filtration at 0.01 μm, ensuring more thorough removal of contaminants, though it does come with a slightly higher filter replacement cost. Its tool-free, quick installation is particularly appealing to renters or those wary of complex setups, and the included lead-free stainless steel faucet adds durability and style. However, it requires drilling if no existing sink hole, which could be a hurdle for some apartments, and the filter replacement expenses can add up over time. Limited to cold water supply, it’s best suited for households prioritizing filtration quality and ease of installation.
Pros:- Effective multistage filtration reduces chlorine, heavy metals, and odors
- Easy, tool-free installation with quick filter replacement
- Includes a durable, lead-free stainless steel faucet
Cons:- Requires drilling if no existing sink hole, which may be inconvenient
- Filter replacement cost can accumulate over time
Best for: Renters or apartment dwellers who want effective filtration without extensive plumbing modifications
Not ideal for: Homeowners with existing sink holes or those seeking filtered hot water options, as it only connects to cold water
- Filtration Micron:0.01 μm
- Flow Rate:0.75 gpm at 60 psi
- Material:BPA-free, lead-free, stainless steel faucet
- Filter Replacement Cost:Less than $36.99 per filter
- Installation:Under sink, requires drilling if no existing hole
- Compatibility:Connects to 1/2” or 3/8” cold water lines
Our verdict“This pick makes the most sense for renters and apartment residents who prioritize high-quality filtration and straightforward setup.”
How We Picked
The products in this roundup were selected based on performance, ease of installation, size, and reliability. Priority was given to models that offer effective contaminant reduction, certified filtration standards, and compatibility with typical apartment under-sink spaces. Cost and filter lifespan were also key considerations, balancing value against long-term maintenance. The ranking reflects a combination of filtration quality, user-friendliness, and overall value for apartment dwellers, who often need space-efficient and straightforward solutions.| under sink water filter for apartment | Certification |
|---|---|
| Waterdrop UL12A Under Sink Wat | NSF/ANSI 42 & 372 |
| Waterdrop WD-TSA-UF 0.01 μm Ul | — |
| iSpring RCC7AK-BN NSF Certifie | NSF/ANSI 58 |
| Waterdrop TSU 0.01 Micron Ultr | NSF/ANSI 372 |
| Amazon Basics Under Sink Water | NSF/ANSI 42 & 372 |
| Frizzlife Under Sink Water Fil | NSF/ANSI 42, 53, 372 |
| Waterdrop 15UA Under Sink Wate | — |
| Waterdrop 15UB Under Sink Wate | NSF/ANSI 372, 42, 53 |
| CuZn UC-200 Under Sink Water F | NSF/ANSI 42 & 372 |
| ICEPURE Under Sink Water Filte | — |
| Waterdrop 15UB-UF 0.01 μm Ultr | — |
Factors to Consider When Choosing Best Under Sink Water Filter For Apartments
Choosing the best under sink water filter for apartments requires evaluating several factors beyond just filtration performance. Space constraints, ease of installation, and maintenance are often overlooked but crucial for apartment settings. Understanding these factors helps prevent common mistakes, such as choosing a filter that’s too large or complicated to install, which can lead to frustration or inadequate filtration. This guide highlights the most important considerations to help you find a solution that balances cost, convenience, and water quality.Filtration Technology and Contaminant Removal
Different filters use various technologies, such as activated carbon, ultrafiltration, or reverse osmosis, each targeting specific contaminants. Reverse osmosis systems typically remove a broader range of impurities, including heavy metals and dissolved solids, but are larger and more expensive. Ultrafiltration offers high-quality removal of bacteria and particulates, making it suitable for most municipal water supplies. Consider your water quality needs and choose a system that effectively addresses your specific concerns to avoid overspending on unnecessary features.
Size and Space Considerations
Apartment kitchens often have limited under-sink space, so compact models are generally preferable. Look for slimline designs that fit within your available cabinet space without blocking access to other pipes or fixtures. Avoid overly bulky systems that may require removing shelves or other storage, which can compromise kitchen organization. Measuring your under-sink area before purchasing ensures you select a model that installs easily and maintains a clean look.
Ease of Installation and Maintenance
Many apartment dwellers prefer filters that are simple to install without professional help. Quick-connect fittings and clear instructions make DIY setup straightforward. Maintenance involves replacing filters periodically; models with longer filter lifespans reduce hassle and ongoing costs. Be mindful of the filter replacement process and availability, as frequent or complicated maintenance can discourage regular upkeep, impacting water quality over time.
Cost and Long-Term Value
Initial purchase price is just one part of the equation. Consider the cost of replacement filters and their lifespan—more durable filters might have a higher upfront cost but save money over time. Some systems also include additional features like dedicated faucets or reminder indicators, which can add to the value. Balancing upfront investment with ongoing maintenance costs ensures you choose a system that fits your budget and water quality expectations.
Certification and Certifications
Look for certifications such as NSF/ANSI 42, 53, or 58, which verify the system’s ability to reduce specific contaminants. Certified filters provide peace of mind and assurance that the system meets safety standards. Non-certified systems might be cheaper but often lack proven efficacy, risking compromised water quality. Prioritizing certified models helps avoid buyers’ remorse and guarantees the system performs as claimed.
Frequently Asked Questions
Can I install an under sink water filter myself in an apartment?
Yes, many under sink water filters are designed for DIY installation, especially those with quick-connect fittings and clear instructions. However, it’s important to measure your available space and ensure your plumbing setup is compatible. If you’re uncomfortable with plumbing tasks, hiring a professional can prevent leaks or damage. Overall, most systems are straightforward enough for confident homeowners or renters with basic tools.
How often do I need to replace the filters in these systems?
Most filters require replacement every 6 to 12 months, depending on usage and water quality. Some models, like the CuZn UC-200, boast up to 5 years of filter life, reducing maintenance frequency. Regular replacement is essential to maintain filtration efficiency and water taste. Checking manufacturer recommendations and setting reminders can help keep your system performing optimally over its lifespan.
Are reverse osmosis systems suitable for apartment use?
Reverse osmosis (RO) systems offer excellent contaminant removal but tend to be larger and require more water and space. They are ideal if your water quality is poor or you want the highest purity levels. However, they may produce wastewater and need more frequent maintenance. For small apartments, compact RO units with integrated storage can work, but ensure your under-sink space can accommodate them comfortably.
Is a dedicated faucet necessary for under sink filters?
Most under sink filters come with a dedicated faucet to deliver filtered water separately from your main tap. This setup is convenient and prevents mixing with unfiltered water, but it does take up additional space and may require extra installation steps. If space is limited, some models allow you to replace your existing faucet or share the filter output with your existing tap, though this may compromise convenience or filtration quality.
How do I know if a filter system is certified and safe?
Look for certification logos from NSF International or other reputable agencies on the product packaging or specifications. Certification confirms that the system has been tested and meets safety and performance standards for contaminant reduction. Avoid systems without certification, as they lack verified efficacy and could leave you with compromised water quality. Always buy from trusted brands that clearly display their certification status.
