Last Updated on September 27, 2026 by Logan Reeves
Choosing the right Aquasana water filter system starts with knowing which contaminants you need to reduce and where you want filtered water. Under-sink systems provide drinking water through a dedicated faucet, while countertop models offer a convenient alternative without plumbing changes.
The Aquasana AQ-5300+.55 is our overall pick, with three-stage Claryum filtration, an 800-gallon rated capacity, and a 0.72 GPM flow rate. For an updated Max Flow option, consider the Aquasana AQ-6300M-BN.
We compared the listed models using manufacturer specifications, certified contaminant-reduction claims, replacement requirements, and installation needs.
Aquasana Water Filter Systems Compared
These four complete systems serve different needs. Compare their rated capacities and flow rates before choosing the model that fits your kitchen.
| Product | Best for | Rated capacity | Rated flow |
|---|---|---|---|
| Best overall | 800 gallons | 0.72 GPM | |
| Updated Max Flow model | 800 gallons | 0.72 GPM | |
| Standard three-stage filtration | 600 gallons | 0.5 GPM | |
| No-plumbing countertop setup | 300 gallons | 0.5 GPM |
Key Takeaways
- For higher daily water use: The Max Flow under-sink models have an 800-gallon rated capacity and a 0.72 GPM flow rate.
- For standard kitchen filtration: The AQ-6300-BN provides three-stage filtration with a 600-gallon capacity.
- For simple setup: The countertop Clean Water Machine requires no plumbing changes but needs an electrical outlet.
- For contaminant reduction: Check the exact model’s performance data sheet rather than assuming every Aquasana filter removes the same substances.
- For ongoing performance: Replace cartridges according to their rated capacity or recommended service interval, whichever comes first.
| Aquasana Under Sink Water Filter System (AQ-5300+.55) | High Performance | Contaminant Reduction: Reduces up to 99% of 78 contaminants | Filter Lifespan: Lasts for 6 months or 800 gallons | Easy Replacement: Simple filter replacements, no hose disconnection | VIEW LATEST PRICE | Read Our Analysis | |
| Aquasana Under Sink Water Filter with Brushed Nickel Faucet | Top Contaminant Reduction | Contaminant Reduction: Reduces up to 99.99% of 78 contaminants | Filter Lifespan: Lasts for 6 months or 800 gallons | Easy Replacement: Easy twist-off housing for filter replacement | VIEW LATEST PRICE | Read Our Analysis | |
| Aquasana Under Sink Water Filter with Faucet | Fast Filtration | Contaminant Reduction: Reduces up to 99.99% of 78 contaminants | Filter Lifespan: Lasts for 6 months or 600 gallons | Easy Replacement: Easy filter replacement by twisting off housing | VIEW LATEST PRICE | Read Our Analysis | |
| Aquasana Countertop Water Filter System | Convenient Countertop | Contaminant Reduction: Reduces up to 99% of 78 contaminants | Filter Lifespan: Lasts for up to 6 months or 300 gallons | Easy Replacement: Easy filter replacements, no installation required | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
1. Aquasana Under Sink Water Filter System (AQ-5300+.55)
Best overallBottom line: The Aquasana AQ-5300+.55 combines an 800-gallon capacity with a 0.72 GPM rated flow rate. It suits households that want filtered drinking and cooking water through a dedicated kitchen faucet.
- Type: Three-stage under-sink system with a dedicated faucet.
- Capacity: 800 gallons, suitable for extended cartridge use.
- Rated flow: 0.72 GPM, faster than the standard three-stage model.
- Maintenance: Replace filters every six months or 800 gallons.
- Certification: WQA certified to NSF/ANSI 42, 53, and 401 for specified reduction claims.
The Aquasana Under Sink Water Filter System (AQ-5300+.55) is an excellent choice for anyone wanting to enjoy clean, great-tasting water straight from the tap without the hassle of slow drip filters. This system reduces up to 99% of 78 contaminants, including lead and PFAS, while keeping essential minerals intact. With a high flow rate, it filters a half-gallon every minute, ensuring you never wait for water. Costing less than 10 cents per gallon, it lasts up to 800 gallons or six months. Plus, filter replacements are easy, requiring no disconnection of hoses or water lines. Enjoy convenience and quality!
The Claryum filtration system targets contaminants such as lead, chlorine, and specified PFAS compounds while retaining naturally occurring minerals. Exact reduction percentages vary by contaminant and should be checked against the model’s certified performance data sheet.
This model requires an under-sink installation and a separate drinking-water faucet. Check the available cabinet space and faucet mounting location before buying.
- Contaminant Reduction:Reduces up to 99% of 78 contaminants
- Filter Lifespan:Lasts for 6 months or 800 gallons
- Easy Replacement:Simple filter replacements, no hose disconnection
- Certification:Certified for contaminant removal
- Cost Efficiency:Costs less than 10 cents per gallon
- Installation:Requires 15.85 inches of space under the sink
- Additional Feature:High flow rate
- Additional Feature:No wait time for filtering
- Additional Feature:Space-saving under sink design
Pros- 800-gallon rated capacity
- 0.72 GPM rated flow
- Certified reduction claims for multiple contaminants
- Dedicated faucet for filtered drinking water
- Replaceable cartridges without disconnecting supply lines
Cons- Requires under-sink installation and cabinet space
- Needs a dedicated faucet mounting location
- Cartridges require regular replacement
Best for: Households wanting a high-flow, three-stage drinking-water system.Skip it if: You cannot install a dedicated faucet or need whole-home filtration.Check first: Confirm cabinet clearance, faucet space, and the AQ-5300+ replacement cartridge model.See today’s price, delivery date and return policy on Amazon.2. Aquasana Claryum 3-Stage Max Flow (AQ-6300M-BN)
Updated Max Flow modelBottom line: The Aquasana AQ-6300M-BN is the updated Max Flow system with a brushed nickel faucet. Its 800-gallon capacity and 0.72 GPM rated flow suit frequent kitchen use.
- Type: Three-stage under-sink system with a dedicated faucet.
- Capacity: 800 gallons, allowing extended cartridge use.
- Rated flow: 0.72 GPM, designed for faster water delivery.
- Maintenance: Replace filters every six months or 800 gallons.
- Certification: WQA certified to NSF/ANSI 42, 53, and 401 for specified reduction claims.
For those seeking a reliable and efficient water filtration solution, the Aquasana Under Sink Water Filter with Brushed Nickel Faucet stands out as an excellent choice. It’s WQA certified to reduce up to 99.99% of 78 contaminants, including chlorine and lead, while leaving healthy minerals intact. With a flow rate of 0.72 gallons per minute, it’s seven times faster than typical pitcher filters, ideal for cooking and hydration. Economically, it costs less than 10 cents per gallon and lasts for six months or 800 gallons. Plus, installation is a breeze, thanks to the included kit and easy filter replacements.
This model uses Aquasana’s three-stage filtration to reduce specified contaminants, including lead, chlorine, microplastics, and PFOA/PFOS. The certified reduction percentage is different for each substance.
The brushed nickel faucet provides a dedicated outlet for filtered water. The installation kit is included, but you still need suitable under-sink space and a place to mount the faucet.
- Contaminant Reduction:Reduces up to 99.99% of 78 contaminants
- Filter Lifespan:Lasts for 6 months or 800 gallons
- Easy Replacement:Easy twist-off housing for filter replacement
- Certification:WQA certified
- Cost Efficiency:Economical at less than 10 cents per gallon
- Installation:Designed for DIY installation
- Additional Feature:WQA certified performance
- Additional Feature:7X faster than pitchers
- Additional Feature:Stylish brushed nickel faucet
Pros- 800-gallon rated capacity
- 0.72 GPM rated flow
- WQA-certified contaminant reduction claims
- Brushed nickel faucet included
- Replaceable three-stage cartridges
Cons- Requires a dedicated faucet installation
- Needs sufficient space inside the sink cabinet
- Replacement cartridges must match the newer model
Best for: Buyers wanting the updated Max Flow model and a brushed nickel faucet.Skip it if: You need a countertop system or cannot install another faucet.Check first: Verify the AQ-6300M-BN model and compatible AQ-C3M-R replacement cartridges.See today’s price, delivery date and return policy on Amazon.3. Aquasana Claryum 3-Stage (AQ-6300-BN)
Standard three-stage optionBottom line: The Aquasana AQ-6300-BN provides three-stage Claryum filtration with a 600-gallon rated capacity. It suits buyers who want a standard-flow under-sink system rather than the higher-capacity Max Flow version.
- Type: Three-stage under-sink system with a dedicated faucet.
- Capacity: 600 gallons, suitable for regular kitchen filtration.
- Rated flow: 0.5 GPM, below the Max Flow models.
- Maintenance: Replace filters every six months or 600 gallons.
- Certification: WQA certified to NSF/ANSI 42, 53, and 401 for specified reduction claims.
Looking for a water filtration solution that delivers rapid results? The Aquasana Under Sink Water Filter with Faucet is your answer. It reduces up to 99.99% of 78 contaminants, including chlorine and lead, while maintaining a remarkable flow rate of 0.5 gallons per minute—five times faster than standard pitcher filters. You’ll enjoy clean water for cooking and hydration without the wait. At less than 10 cents per gallon, it’s economical and lasts for 6 months or 600 gallons. Installation is straightforward, with a complete kit included and support available if needed. Enjoy great-tasting water without the hassle!
The AQ-6300-BN uses three filtration stages, including a sediment stage, to reduce specified contaminants while retaining naturally occurring minerals. It includes a dedicated brushed nickel faucet and installation hardware.
Its main difference from the Max Flow model is capacity and rated flow. Choose it when the standard system meets your household’s needs and you do not require the higher-flow version.
- Contaminant Reduction:Reduces up to 99.99% of 78 contaminants
- Filter Lifespan:Lasts for 6 months or 600 gallons
- Easy Replacement:Easy filter replacement by twisting off housing
- Certification:WQA tested & certified
- Cost Efficiency:Costs less than 10 cents per gallon
- Installation:Designed for DIY installation
- Additional Feature:5X faster than pitchers
- Additional Feature:Replaces 4,400 water bottles
- Additional Feature:Complete installation kit included
Pros- Three-stage filtration
- 600-gallon rated capacity
- WQA-certified reduction claims
- Dedicated faucet and installation kit included
- Replaceable filter cartridges
Cons- Lower rated flow than Max Flow models
- Lower rated capacity than the 800-gallon systems
- Requires under-sink space and faucet installation
Best for: Buyers who want standard three-stage under-sink filtration.Skip it if: You need the higher flow and capacity of the Max Flow models.Check first: Confirm that the listing is AQ-6300-BN, not AQ-6300M-BN, because their replacement filters differ.See today’s price, delivery date and return policy on Amazon.4. Aquasana Countertop Water Filter System (AQ-CWM2-B)
Best no-plumbing optionBottom line: The Aquasana Clean Water Machine (AQ-CWM2-B) provides powered countertop filtration without changing your plumbing. It is designed for households that prefer a refillable dispenser over an installed drinking-water faucet.
- Type: Powered countertop filtration system with a refillable tank.
- Capacity: 300 gallons, with a 64-ounce water tank.
- Rated flow: 0.5 GPM, powered water dispensing.
- Maintenance: Replace filters every six months or 300 gallons.
- Certification: WQA certified to NSF/ANSI 42, 53, and 401 for specified reduction claims.
The Aquasana Countertop Water Filter System is ideal for health-conscious homeowners who want clean drinking water without the hassle of complicated installation. This compact system removes 97% of chlorine and over 99% of 78 contaminants like lead and microplastics using advanced Claryum Technology. You’ll enjoy 8 ounces of filtered water in just 8 seconds, all while retaining beneficial minerals. Plus, it’s eco-friendly—one filter replaces over 2,200 plastic bottles! With no need for plumbing adjustments, you can easily replace filters every six months. Rest assured, it’s certified safe and 100% BPA-free for your peace of mind.
The Clean Water Machine has a removable 64-ounce water tank. Fill it with tap water, place it on the dispenser, and use the button to dispense filtered water. The powered design requires an electrical outlet, but no water-line connection.
Its 300-gallon filter capacity is lower than the under-sink models. You will also need to refill the tank as you use water, making it a different everyday experience from a permanently connected system.
- Contaminant Reduction:Reduces up to 99% of 78 contaminants
- Filter Lifespan:Lasts for up to 6 months or 300 gallons
- Easy Replacement:Easy filter replacements, no installation required
- Certification:WQA tested and certified
- Cost Efficiency:Not specified
- Installation:No installation required
- Additional Feature:97% chlorine removal
- Additional Feature:No installation required
- Additional Feature:Eco-friendly design
Pros- No plumbing installation required
- Powered dispensing
- 64-ounce removable water tank
- WQA-certified contaminant reduction claims
- Compact countertop design
Cons- Requires an electrical outlet
- Water tank needs manual refilling
- Lower rated filter capacity than the under-sink models
Best for: Apartments, renters, and kitchens where plumbing changes are inconvenient.Skip it if: You want continuous filtered water without refilling a tank.Check first: Make sure you have enough counter space and an accessible electrical outlet.See today’s price, delivery date and return policy on Amazon.
Aquasana AQ-5300+.55 vs AQ-6300M-BN: Which Should You Get?
Both models have an 800-gallon rated capacity and a 0.72 GPM rated flow. The main decision is whether you prefer the original AQ-5300+ system or the updated AQ-6300M model.
- Rated capacity: Both systems provide 800 gallons before the stated capacity limit.
- Rated flow: Both deliver 0.72 gallons per minute under their specified test conditions.
- Replacement compatibility: The AQ-5300+ uses AQ-5300+R replacements, while the AQ-6300M uses AQ-C3M-R replacements.
- Faucet: Both listed variants include a brushed nickel dedicated faucet.
Which Aquasana Water Filter Should You Buy?
- Higher-flow kitchen filtration: Get the Aquasana AQ-5300+.55.
- Updated Max Flow system: Get the Aquasana AQ-6300M-BN.
- Standard three-stage filtration: Get the Aquasana AQ-6300-BN.
- No plumbing changes: Get the Aquasana AQ-CWM2-B Clean Water Machine.
- Limited cabinet space: Consider the Aquasana AQ-CWM2-B if you have room on the countertop instead.
How We Chose
Our comparison focuses on the features that affect everyday use and long-term ownership. We used published product information rather than claiming independent laboratory testing.
- Contaminant reduction: Manufacturer performance data and applicable NSF/ANSI certification claims.
- Water delivery: Rated flow, filtration capacity, and differences between installed and countertop systems.
- Installation: Faucet requirements, cabinet space, plumbing connections, and electrical needs.
- Maintenance: Cartridge compatibility, replacement schedules, and ongoing ownership requirements.
- Safety: Manufacturer instructions and publicly available product-safety information.
Factors to Consider When Choosing Aquasana Water Filter Reviews
Before choosing an Aquasana water filter, compare the contaminants it is certified to reduce, its installation requirements, and its ongoing maintenance needs. The right model depends on your water quality, available space, and daily water use.
Filtration Performance Standards
Start with your water quality report or a suitable water test. Different filters have different certified reduction claims, so a brand-wide statement cannot replace the performance data for a specific model.
The Claryum under-sink systems and Clean Water Machine have WQA-certified claims under NSF/ANSI Standards 42, 53, and 401. These cover specified substances and performance categories. Check the exact performance data sheet for the contaminants that matter to you.
A system’s highest advertised reduction percentage does not apply equally to every contaminant. Lead, chlorine, microplastics, and PFOA/PFOS have their own test results.
If your priority is a high-flow drinking-water system with certified reduction claims, consider the Aquasana AQ-6300M-BN.
Installation Requirements and Ease
Under-sink systems connect to the cold-water supply and use a dedicated filtered-water faucet. Check the cabinet dimensions, tubing route, and available faucet opening before installation.
Many homeowners can install these systems using the supplied instructions and hardware. However, plumbing experience, local requirements, and your kitchen layout may make professional installation appropriate.
The Aquasana AQ-CWM2-B avoids plumbing changes. It needs countertop space, a power outlet, and regular tank refilling.
Cost Effectiveness Over Time
Evaluate the total cost of ownership rather than focusing only on the initial system. Replacement cartridges, installation supplies, and maintenance all affect long-term spending.
The Max Flow systems have an 800-gallon rated capacity, the standard three-stage model has a 600-gallon capacity, and the countertop unit has a 300-gallon capacity.
Actual replacement frequency depends on your water use and the manufacturer’s service interval. Compare the correct replacement cartridge costs for each model before deciding.
Maintenance and Replacement Frequency
Regular cartridge changes help maintain the filtration performance specified by the manufacturer.
The two Max Flow systems have an 800-gallon capacity, while the standard three-stage model has a 600-gallon capacity. Both types have a recommended replacement interval of about six months.
The countertop Clean Water Machine also has a six-month service interval, but its rated capacity is 300 gallons.
Replace filters when they reach their rated capacity or service interval, whichever comes first. Follow the model-specific instructions for flushing new cartridges and checking connections.
Environmental Impact Considerations
A home filtration system can reduce reliance on single-use bottled water when you regularly fill reusable bottles and containers.
Consider cartridge lifespan, replacement materials, and the system’s operating requirements. The countertop model uses electricity, while the under-sink systems operate using household water pressure.
Choosing a system that suits your actual water use can also help avoid unnecessary replacements and equipment purchases.
Matching the Filter to Your Water Source
Most standard drinking-water filters are designed for treated household tap water. Do not assume a filter makes untreated or microbiologically unsafe water safe to drink.
If you use private well water, test it for relevant contaminants and microbial hazards. You may need additional treatment or disinfection depending on the results.
Consult the manufacturer’s instructions and performance data before selecting a system for your water source.
Mistakes to Avoid When Buying Aquasana Water Filters
- Choosing by brand alone: Check the exact model’s certified reduction claims.
- Confusing model variants: Standard and Max Flow systems have different rated capacities and replacement cartridges.
- Ignoring installation space: Measure cabinet clearance and check faucet mounting options.
- Overlooking replacement costs: Include ongoing cartridge purchases in your comparison.
- Assuming every filter removes fluoride: Verify a specific fluoride reduction certification before buying.
Frequently Asked Questions
How Often Should I Replace My Aquasana Water Filters?
Most models in this comparison have a recommended replacement interval of six months, but their gallon capacities differ. The Max Flow systems are rated for 800 gallons, the standard three-stage model for 600 gallons, and the countertop system for 300 gallons. Replace cartridges when either limit is reached and follow the instructions for your specific model.
Are Aquasana Filters Effective Against Lead and Chlorine?
Yes, the listed Claryum systems have certified claims for reducing lead and chlorine. However, each contaminant has a separate tested reduction percentage. Check the exact model’s performance data sheet to understand what it reduces and by how much. Filtration performance also depends on using genuine compatible cartridges and replacing them according to the manufacturer’s instructions.
Can I Install Aquasana Filters Myself?
Yes, the under-sink systems are designed for installation using the supplied hardware and instructions. You need a suitable cold-water connection, cabinet space, and a dedicated faucet location. If you cannot modify your plumbing, the countertop Clean Water Machine requires no water-line installation. Follow all setup and flushing instructions before drinking filtered water.
What Is Aquasana’s Warranty Policy on Their Water Filters?
Warranty coverage depends on the exact Aquasana product. The listed under-sink systems and countertop Clean Water Machine include a one-year limited warranty according to their product documentation. Replacement cartridges may have different coverage. Review the warranty supplied with your specific model for eligibility, exclusions, proof-of-purchase requirements, and the procedure for requesting service.
Do Aquasana Filters Remove Fluoride From Water?
Not every Aquasana filter is certified to reduce fluoride. The standard Claryum systems in this comparison should not be treated as fluoride-removal systems without a specific certified claim. Aquasana’s SmartFlow reverse osmosis system has a published fluoride reduction claim, but it is a different product. Check the performance data sheet before buying a filter specifically for fluoride reduction.
Do Aquasana Water Filters Remove PFAS?
Selected Aquasana systems have certified reduction claims for PFOA and PFOS, which are two PFAS compounds. This does not mean a system removes every PFAS chemical. Check the performance data sheet for the exact contaminants tested, their reduction percentages, and the applicable standards. If PFAS contamination is a concern, compare those claims with your water test results.
Does the Aquasana Countertop Water Filter Need Electricity?
Yes, the Aquasana Clean Water Machine uses powered filtration and dispensing, so it needs an electrical outlet. You fill its removable tank with tap water and place it on the dispenser. Unlike the under-sink systems, it does not require a direct plumbing connection. Consider its countertop footprint and 64-ounce tank capacity before buying.
What Is the Difference Between Standard and Max Flow Aquasana Filters?
The main differences are rated flow and cartridge capacity. The standard AQ-6300-BN is rated for 0.5 GPM and 600 gallons. The AQ-6300M-BN Max Flow is rated for 0.72 GPM and 800 gallons. Both use three-stage filtration, but their replacement cartridges differ. Confirm the exact model before ordering replacement filters.
Final Verdict
The best Aquasana water filter system depends on how you plan to use it. For a dedicated kitchen faucet, the Aquasana AQ-5300+.55 offers an 800-gallon capacity and a 0.72 GPM rated flow.
If you prefer the updated Max Flow model, the AQ-6300M-BN offers the same rated capacity and flow. For a kitchen where plumbing changes are not practical, the countertop Clean Water Machine provides a different installation option.
Also compare the Aquasana AQ-6300-BN for standard three-stage filtration and the Aquasana AQ-CWM2-B Clean Water Machine for countertop convenience.
