Top 10 Best reverse osmosis filter in 2026

Last Updated - 6/12/2026

🏆Best Choice

APEC WATER

APEC Water Systems FILTER-SET-ES High Capacity Replacement Pre-Filter Set For Essence Series Reverse Osmosis Water Filter System Stage 1-3

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•APEC Water ESSENCE Series FILTER-SET-ES is for ROES-50, ROES--PH75, and ROES-UV75.
•Includes (1) sediment and (2) carbon block filters to protect and extend the life of the RO system
•1st stage 5 micron Polypropylene sediment filter to remove dust, particles, and rust
•2nd & 3rd stage 10 micron extruded carbon block filters to remove chlorine, taste & odor
•High performance replacement filters are compatible with all standard sized under counter RO systems

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$29.95

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iSpring

iSpring F9K NSF Certified 1-Year Reverse Osmosis Water Filter, Alkaline Remineralization Filters for 6-Stage RO Systems, Without RO Membrane

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•【1-Year Water Filtration Replacement Pack】This pack contains individually wrapped high-capacity filter replacement cartridges designed for 6-stage RO systems, providing a full year of filtration. The pack includes 9 filters: 2x sediment filters, 2x granular activated carbon filters, 2x carbon block filters, 1x post-carbon filter, and 2x alkaline filters.
•【Standard Size RO Replacement Cartridges】iSpring water filter cartridge set fits standard housings that require 10” x 2.5” reverse osmosis water filter cartridges.
•【Efficient Filtration】Experience clean, safe, and good-tasting water every time you turn on the faucetand, providing a wonderful drinking experience for your whole family. Enjoy crystal clear ice cubes, fresher tea and coffee, better tasting foods, healthier baby formula – even better than most bottled water.
•【pH-Balanced Alkaline Water Filter】The alkaline mineral filter produces alkaline water with restored healthy minerals such as natural calcium, magnesium, and potassium ions, which ph-balances the RO water. Length: 10", O. D. = 2.5". This alkaline water filter is a great add-on for under sink water filters or reverse osmosis systems.
•【Please Note】This water filter replacement cartridge pack does NOT include an RO membrane. Updated FA15 alkaline mineral filters and FT15 post-carbon filters are built with a secure push-fit quick connection, which allows faster filter replacement. If you have trouble installing the filters, please refer to the user manual or contact us.

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$60.03

$77.00

-22%

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iSpring

iSpring RCC7AK, NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Under Sink, Patented Top-Mounted Faucet Design for Easy Installation

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•PATENTED DESIGN – The top-mounted fastener allows for easy countertop installation entirely from above, eliminating the hassle of tightening the nut from underneath the sink.
•MINERAL BOOST – The patent-pending natural mineral AK stage delivers spring water with a balanced, healthy pH and multiple essential minerals.
•SEE WHAT’S CAUGHT – The transparent first-stage filter housing makes it easy to monitor contaminant buildup, ensuring timely filter changes.
•NSF 58 CERTIFIED RO SYSTEM – Unlike other brands that lack NSF certification or full system certification, our RCC7AK is certified to NSF/ANSI 58 and 372 standards for the entire water filtration system.
•EFFECTIVE FILTRATION – Reduces TDS (93-98%), PFAS (96-99%), Chlorine (95-99%), Asbestos (>99.7%), Barium (>98.4%), Cadmium (>98.8%), Chromium (>99.2%), Copper (>97.8%), Fluoride (>97.4%), Lead (>98.9%), Selenium (>99.0%), and over 1,000 other contaminants.
•EASY INSTALLATION – The RO water system features a DIY-friendly design with quick-fitting connections, a clear manual, and step-by-step videos for a hassle-free setup.
•TRUSTWORTHY SUPPORT – America’s favorite RO brand, backed by lifetime technical support in Atlanta, GA, ensuring expert assistance whenever you need it.
•CONVENIENT REPLACEMENT FILTERS - Easy access to replacement filter sets: F4AK (6-Month), F9K (1-Year), F19K75 (2-Year), and F28K75 (3-Year).

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$234.99

$279.00

-16%

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Bluevua

Bluevua RO100ROPOT-UV Reverse Osmosis System Countertop Water Filter - 6 Stage Purification with UV and Remineralization, Counter RO Filtration, Portable Water Purifier

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•6-STAGE ADVANCED FILTRATION WITH UV LIGHT: The Bluevua RO100ROPOT-UV boasts a superior 6-stage filtration system, featuring a 0.0001μm RO membrane, including UV light and an added remineralization filter. Certified by WQA against NSF/ANSI/CAN 372 for lead-free and tested by SGS, this combination effectively reduces TDS, PFOA, PFOS, Chlorine, Fluoride, Arsenic, Lead, and more, while also enriching water with essential minerals, balancing taste and health benefits.
•COUNTERTOP FILTRATION + PREMIUM-QUALITY CARAFE: No plumbing or installation is required for this RO system. Simply plug this portable piece of tech into any power source and you're ready to fill it up and go! Better yet, the water container is constructed of a high borosilicate glass carafe instead of the traditional plastic, reducing the risk of secondary pollution and making this one of the best countertop water filter systems.
•POWER SAVING + WATER SAVING: The water system automatically enters power-saving standby mode when not in use to reduce power consumption. Filters are also designed to help save water with an impressive 2:1 Pure to Drain ratio. Leftover water from a cycle isn't deemed wastewater so more water is saved to use for various household purposes.
•FILTER LIFE MONITOR: The countertop water filters last for a long time between 12-24 months to provide 1-2 years of clean drinking water before needing replacement. Monitor display shows the service life of filters and water quality so you can easily keep track of filter replacement and periodically switch out filter tubes.
•SUSTAINABLE HYDRATION: 1-year limited manufacturer warranty included upon registration. Designed with premium quality components for years of reliable use, our RO system delivers bottled-quality water at home, reducing plastic waste and supporting sustainability efforts with ClimatePartner Certification.

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$409.00

$454.00

-10%

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iSpring

iSpring F7-GAC NSF Certified 1-Year Replacement Filter Cartridge Pack, 7-Count for Standard 5-Stage Reverse Osmosis (RO) Systems

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•HIGH-CAPACITY REPLACEMENT FILTER PACK - Individually wrapped 1-year filter cartridge set designed for most standard 5-stage RO systems
•CLEAN, SAFE, GREAT-TASTING WATER - Enjoy pure, refreshing water straight from your faucet, with crystal-clear ice cubes, fresher tea and coffee, better-tasting food, and healthier baby formula—better than most bottled water
•COMPLETE 7-PIECE FILTER SET - Includes (2) sediment filters, (2) granular activated carbon (GAC) filters, (2) carbon block (CTO) filters, and (1) post-carbon filter for comprehensive filtration
•RO MEMBRANE NOT INCLUDED - This filter pack does not include a reverse osmosis membrane
•EASY & SECURE FILTER REPLACEMENT - The upgraded FT15 post-carbon filter features a push-fit quick connection for faster, hassle-free installation. For assistance, refer to the user manual or contact our support team

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$38.91

$45.99

-15%

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APEC WATER

APEC Water Systems ULTIMATE Series US Made Stage 1, 2 & 3 Replacement Filter For Undersink System(FILTER-SET)

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•APEC Water ULTIMATE Series FILTER-SET is for RO-45, RO-90, RO-PH90, RO-PERM, RO-PUMP, and compatible with all 10" standard industry reverse osmosis water filter system .
•Includes (1) sediment and (2) carbon block filters to protect and extend the life of the RO system
•1st stage Polypropylene sediment filter to remove dust, particles, and rust
•2nd & 3rd stage extruded carbon block filters to remove chlorine, taste & odor
•APEC's extruded solid carbon block filters far surpass GAC filters in performance and absorptive capacity; in addition they do not leak carbon fines.

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$44.95

$49.99

-10%

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SimPure

SimPure Y7P-BW UV Countertop Reverse Osmosis Water Filter, NSF/ANSI 58 Certified, 5 Stage RO Water Filtration System, Water Purifier for Home, 4: 1 Pure to Drain, BPA Free (No Installation Required)

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•TESTED AND CERTIFIED BY SGS: Against NSF/ANSI 58 Standard: Converts your tap water/well water(TDS<500 ppm) into pure and healthy drinking water by removing 99.99% of the 1,000+ contaminants including total coliforms, chemicals (PFAS/PFOA/PFOS, Pharmaceuticals), heavy metals (Lead, Arsenicetc), chlorine, TDS (fluoride, nitrates/nitrites) and etc. Say goodbye to the hidden dangers of tap water
•UV PURIFICATION SYSTEM: Use no chemicals and emits absolutely no by-products. SimPure UV purification system combined with 4-Stages 0.0001μm RO Filtration System, can take water purification to next level. Taste the refreshing difference
•NO INSTALLATION REQUIRED: Simply plug it in and enjoy purified water instantly. Eliminating installation hassles and complex filter replacements. Unlike traditional under sink water filter systems, Y7P counter top RO water filter free from water source and space constraints. Place it anywhere with a power supply – perfect for homes, apartment, kitchens, offices, camping, RVs, and more
•EFFORTLESS HYDRATION & ELEVATED LIFESTYLE: SimPure Y7P desktop water purifier included a full set of quick-change twist filter cartridges provide 528 gallons of purified water (approximately 6000 bottled water). Embrace a sustainable lifestyle, reduce plastic waste, and save money with SimPure. It's not just purified water; it's an elevated standard of living, making each sip a testament to the purity and sustainability it offers
•HIGH EFFICIENCY IN WATER PURIFYING: Achieving a 4:1 pure to drain ratio, the SimPure Y7P boasts the highest water utilization rate among RO systems available in the market. With the innovative recycling multi filtration technology, it can save up to 1500% more water compared to under sink RO water filtration systems. Additionally, the faster dispense flow rate (418 GPD) ensures you can enjoy a cup of purified water in approximately 15 seconds
•SERVING USA SINCE 2006: Seattle, WA USA, SimPure dedicated in providing world-class quality of water filtration solutions. Your satisfaction is our priority. Contact our trained water specialists with any questions – we're here to support you throughout the product's life. (Please scroll down for replacement filter purchase options)
•The SimPure Y7P countertop water filter stands 16.1 inches tall with the lid closed and 21.3 inches when fully open. Place it under cabinets with at least 22 inches of vertical clearance to allow smooth lid operation. If space is limited, this RO water filter system also works on open countertops, tea tables, or kitchen island
•Please note that the SimPure Y7P water purifier only dispenses water at room temperature and cannot provide hot or chilled water

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$249.99

$369.99

-32%

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SimPure

SimPure 5-Stage Reverse Osmosis Replacement Filter Set with 75 GPD RO Membrane, 5pc Pre & Post Replacement Cartridge Pack Kit for Standard 5-Stage Reverse Osmosis RO Systems

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Wide Compatibility: Compatible with most 10" standard under the counter reverse osmosis water systems, such as SimPure T1; APEC Water Systems RO-90, ROES-UV75, ROES-PH75 and most standard 5 or 6 stage RO systems. (Quick connect T fittings for systems with screw-in inline filter are also included).
•Sediment Water Filter: Works as the first barrier in the reverse osmosis system by removing solid particles like rust, sand, dirt and silt from the water and reducing a significant percentage of contaminants in the water. This prevents the other filters from getting clogged with fine particles and reduces the risk of damage to the other parts of the filtration system.
•Pre-Carbon Filter: 5 micron granular activated carbon and activated carbon block filters protect your system from chlorine damage and remove volatile organic chemicals. Improves the taste of the water and extends RO membrane's life.
•Reverse Osmosis Membrane: The 75 GPD RO Membrane is specially designed with density graded layers of filtration to filter the hardest to remove contaminants like dissolved solids, microplastics, fluoride, Heavy Metals, and more. It is tested by independent third-party to meet NSF/ANSI 58 standrad.
•Post-Carbon Water Filter: As the final stage of filtration in your system, this post activated carbon water filter built-in 1/4 inch (JG) quick connections in both two ends removes any remaining contaminants while enhancing the flavor of drinking water.
•Items with a new or old label randomly sent.

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$34.53

$43.17

-20%

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PUROFLO

Puroflo ERO 5 pc Reverse Osmosis Filters Yearly Set, 5 Stage Reverse Osmosis Water Filter, Under Sink RO Water Filtration System Kit, Compatible with Most 10" RO System, Water Filter Wrench Included

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•NSF Certified: The reverse osmosis water filter replacement set efficiently removes thousands of harmful contaminants from tap water such as PFAS, Chlorine, Fluoride, Lead, Arsenic, bad tastes/odors, and other heavy metals & chemicals.
•Pure Tasty Water: Multi-stage carbon block absorbs chlorine byproducts, and Inline-carbon refreshes tastes. Puroflo RO water filter provides you better tasting water than bottled water.
•Easy to Install: Reference the video on this page, or on YouTube. The installation of the 5 stage RO filter replacement is simple and universal to most standard RO water filter systems.
•Included: sediment filter, carbon filters, 50GPD RO Membrane, 1/4" quick-connect Inline-GAC filter. 1 Pc water filter wrench.
•Compatibility: Puroflo reverse osmosis filters is an affordable alternative for expensive brand name filters. Compatible with APEC ROES-50 replacement filters, Watts premier replacement filters, Rodi system, PA-E ro-132 replacement filters and other 10" standard RO water filter system.
•Extended Filter Life: The replacement of Stages 1 to 3 RO filters typically lasts around 6-12 months, while the membrane and the 5th stage inline reverse osmosis water filter can extend up to 1 year
•NOTE: Only work for 1/4" push-in tube. The actual filter life may vary depending on your local water quality

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$66.99

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Waterdrop

Waterdrop G5P700A Alkaline Mineral pH+ Reverse Osmosis Water Filter, NSF/ANSI 372 Certified, 700G Reverse Osmosis System, 8 Stage RO Water Filtration System, 2:1 Pure to Drain, Smart LED Faucet

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•𝟖-𝐒𝐭𝐚𝐠𝐞 𝐏𝐫𝐞𝐜𝐢𝐬𝐞 𝐅𝐢𝐥𝐭𝐫𝐚𝐭𝐢𝐨𝐧: Tested by SGS, the reverse osmosis system features an advanced 8-stage filtration process that reduces harmful contaminants such as PFOA, PFOS, chlorine, bad taste and odor, lead, fluoride, heavy metals, and other impurities. Enjoy clean and safe water with Waterdrop G5P700A
•𝟎.𝟎𝟎𝟎𝟏μ𝐦 𝐑𝐎 + 𝐀𝐝𝐝𝐞𝐝 𝐌𝐢𝐧𝐞𝐫𝐚𝐥𝐬: The G5P700A combines a precise 0.0001μm RO membrane with alkaline mineralization technology, effectively reducing particles larger than 0.0001μm while enriching water with essential minerals like Ca²⁺, Mg²⁺, Na⁺ and K⁺
•𝐂𝐨𝐦𝐩𝐚𝐜𝐭 𝐓𝐚𝐧𝐤𝐥𝐞𝐬𝐬 𝐃𝐞𝐬𝐢𝐠𝐧: Say goodbye to large tank systems. The tankless RO system’s modern tankless design frees up to 70% of your under-sink space, making it ideal for today's household spaces. Its slim and stylish build perfectly matches any kitchen style
•𝟕𝟎𝟎𝐆𝐏𝐃 𝐇𝐢𝐠𝐡-𝐒𝐩𝐞𝐞𝐝 𝐅𝐥𝐨𝐰: With a robust 700GPD (gallons per day) capacity, the G5P700A provides a consistent and rapid water flow, filling a 6-ounce cup in just 6 seconds. Enjoy immediate access to purified water, perfect for busy households
•𝟐:𝟏 𝐏𝐮𝐫𝐞-𝐭𝐨-𝐃𝐫𝐚𝐢𝐧 𝐑𝐚𝐭𝐢𝐨: This RO water filtration system offers an impressive 2:1 purified water ratio, generating 400% more clean water compared to conventional systems. This not only reduces costs but also supports environmental sustainability by minimizing water waste
•Please note: Faucet installation requires drilling holes in the countertop.

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$309.99

$359.99

-14%

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