Top 10 Best replacement under sink water filters in 2026

Last Updated - 6/27/2026

🏆Best Choice

FRIZZLIFE

Frizzlife FZ-2 Replacement Filter Cartridge For MP99, MK99, MS99 Under Sink Water Filter & MV99 RV Filter

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Two-Stage Advanced Purify: 2 in 1 TWO-STAGE compoud filter, sediment filter cartridge with 5 micron precision reduces particle material such as sand, silt and rust from the water. Block carbon filter cartridge with 0.5 micron precision that reduces Lead, Chlorine, Odor and Particles from the water.
•High Benefits: The Frizzlife MP99, MK99, MV99, MS99 has unique technology that reduces of contaminants while leaving in all essential minerals, which are vital to your health, including calcium, potassium, and magnesium. Enjoy pure and healthy water from the tap.
•Compatible Replacement Filter for Frizzlife MP99 water filtration system(ASIN B07J9QRVDM), MK99 water filter system(ASIN B07MFYQBTX), MV99 Inline RV filter(ASIN B08PCJNPHR) and MS99 Inline Water Filter for Refrigerator(ASIN B08NY78DC3). It's the only core filter cartridge you will need to replace for them.
•Long Service & High Flow Rate: Quick change filter replacement filter provide your family a clear, clean, lead free, odorless water. Enjoy tap water as pure and healthy as spring water.

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$19.99

$25.00

-20%

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FRIZZLIFE

Frizzlife M3005 Replacement Filter Cartridge Set (4 Pack) For SK99,SP99,SK99 NEW and SP99 NEW Under Sink Water Filter System

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•High Filtration Performance: Adopting 0.5 micron purification accuracy, almost 10X higher than other brands. Certified to reduce Lead, Chlorine, Taste & Odor and Particulates. Leave in all the beneficial minerals.
•Compatible Replacement Filters for Frizzlife SP99 (ASIN B07Y1M1FJ8) , SK99 (ASIN B07Y1D6YFQ) , SK99 NEW (ASIN B08NDYVZV5) and SP99 NEW (B08NDXVPC9) under sink water filter system.
•Long-Lasting & Affordable Service: Far cheaper than buying expensive bottled water. Frizzlife always delivers superior, prolonged and affordable water filtration service for our customers.
•Quick Change & No Extra Tools: The twist-in filter system makes the filter replacement a breeze. Only use the housing wrench inside the box and No extra tools required. Save your time and energy. Your hassle-free life is our concern.
•It is recommended to change sediment filter every 3-6 months of usage after installation, change 3-5 micron CTO every 8-12 months of usage and change 0.5 micron CTO every 12-18 months of usage after installation (actual service life depends on your water quality and daily usage).

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$49.99

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FRIZZLIFE

Frizzlife Under Sink Water Filter System SK99-NEW, Direct Connect, NSF/ANSI 53&42 Certified 0.5 Micron Carbon Block, Remove Lead, Chlorine, Chloramine, Fluoride, Odor & Bad Taste- Quick Change

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•【Fully Certificated System】Frizzlife SK99 under sink water filter system is rigorously tested and certified by IAMPO against NSF/ANSI 42&53 for Material Safety, Structure Integrity, Flow rate, and Filtration Effectiveness on eliminating but not restrict to chlorine, particle class, and lead. Note: Do not reduce TDS!
•【Premium Filtration Performance (0.5 Micron)】Adopting 0.5 micron filtration accuracy, almost 10X higher than other brands, the compounded filter cartridges of SK99 under counter water filter consist of 8 layers of filtration materials. Certified to reduce Lead, Chlorine, Taste & Odor and Particulates. Leave in all the beneficial minerals.
•【Fast Water Flow & DIY Installation】The water filter for sink features with strong flow, it can fill up a cup of water in 3 secs. The installation takes less than 15 minutes, no plumber required. With TWIST-IN design, the replacement of the filters is super easy even for elders. The SK99 under sink filter system can simultaneously serve both of your sink and refrigerator by using ice maker kit IMC-2 (Asin#B07RBMLR26). The claim of capacity is verified through manufacture internal testing only.
•【Money Saver & Green Choice】Frizzlife SK99 under sink water filter systems are designed with the concept of green, convenience and cost-effective. When replacing the filters, You don’t have to throw away the whole plastic housing but only the core filters inside. Choose Frizzlife to save more waste to the earth, and enjoy the great-tasting water in a more economic and green way! Search replacement filters: M3001, M3002,M3003, and the filter set M3005
•【Superior Design with 24/7 USA Tech Support】The complete water filtration system of NEW SK99 has been upgraded, featured with stronger cases, bottom caps, integrated water board, etc. A pressure regulator is added, serving as double insurance. No more leakage or crack concerns! The compact design of the water filter for sink can fit your cabinet under the sink.

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$100.78

$125.99

-20%

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FRIZZLIFE

Frizzlife ASR211 Replacement Filter Cartridge For PD600-TAM3, PD400, PD500, PD800-TAM4 Reverse Osmosis System (1st Stage)

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Advanced 2-in-1 composite filter, blocks fine debris and reduces particles such as sand, silt, rust and other insoluble impurities from water. Conditions the water and prolong the service life of RO membrane.
•1st stage replacement filter for Frizzlife undersink reverse osmosis water filter system PD600-TAM3 (ASIN#B083DFW1QS), PD400 (ASIN#B08PYHJ8CJ ), PD500 (ASIN#B08PXSFB9V), PD800-TAM4 (ASIN#B0B3181JK6 ).
•QUICK CHANGE & TOOL FREE: ASR211 can be replaced only with one single turn after shutting off the power supply. Super easy replacement requires NO tools and saves your time and energy.
•Please replace the ASR211 composite filter every 12 months. (Please kindly note that the replacement period highly depends on your feed water quality and daily water usage)

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$33.99

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FRIZZLIFE

Frizzlife ASR212-600G RO Replacement Filter Cartridge for PD600-TAM3 (2nd Stage)

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•2nd stage replacement filter for Frizzlife PD600-TAM3 undersink reverse osmosis water filter system (ASIN#B083DFW1QS).
•High grade 0.0001 micron RO membrane, gets rid of 99.99% of 1000+ contaminants, including chlorine, lead, heavy metals, fluoride, mercury, VOCs, chloramine, arsenic and much more. (2 years)
•QUICK CHANGE & TOOL FREE: ASR212 RO membrane can be replaced only with one single turn after shutting off the power supply. Super easy replacement requires NO tools and saves your time and energy.
•Please replace the ASR212 composite filter every 2 years. (Please kindly note that the replacement period highly depends on your feed water quality and daily water usage)

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$85.99

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FRIZZLIFE

Frizzlife LP365 Smart Water Monitor and Automatic Shutoff - 0.01GPM Ultrasonic Micro Leak Detection, APP Wi-Fi Remote Control, Real-Time Flow/Temp Monitoring, 24/7 Water Usage Reports, 3/4" and 1"

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•⭐Real-Time Leak Alerts＆Notifications--Auto Shutoff--Patented Ultrasonic Micro Leak Detection--Phone Control from Anywhere--Daily and Monthly Water Monitoring--Linking with Other Smart Devices
•[24/7 Real-Time Alerts＆Notifications, Wherever You Are]--Stay connected and informed in the event of a leak or even a minor risk, frizzlife sends alerts via sms, phone calls, and app notifications, and automatically closes the valve to prevent further damage. whether you're home or away, you’re always in control.
•[Ultrasonic Technology for Precise Flow Monitoring]--Upgraded ultrasonic technology, Frizzlife accurately monitors water flow rates, detecting even the smallest changes—down to 0.01 gpm. This precise flow monitoring ensures reliable leak detection and extends device lifespan, saving you time and maintenance costs while keeping your home protected.
•[APP-Based Control With Real-Time Water Usage]--Using the “smart life” app, you can control the frizzlife valve remotely and access real-time insights on water usage, including flow rate, temperature, and pressure. enjoy worry-free monitoring, even while on vacation, at work, or on the go.
•[Personalized Leak Protection For Your Unique Needs]--Customize your leak protection to match your household’s specific needs. frizzlife allows for tailored settings based on water usage habits, family size, and daily schedules, reducing false alarms and ensuring precise, responsive protection.
•[Fits 1-Inch ＆ 3/4-Inch Diameter Pipe]--The frizzlife leak protector fits both 1-inch and 3/4-inch pipes, with all necessary installation components included. for best results, professional installation is recommended. frizzlife also provides 24/7 customer support for any questions, ensuring you’re covered from purchase to setup and beyond. Frizzlife LP365 includes：LP365 System with NPT=1” (MALE) pipe，NPT=3/4” (MALE) adapters*2，plug*1, 6.6 feet power cable*1, Plumbing Tape *1.
•⭐The Frizzlife LP365 is approved by a third-party laboratory -If you are simulating the effectiveness of the leak, please use the “LEAK TEST” function，other INCORRECT operations have nothing to do with real alarms！
•⭐When installing the equipment outdoors, we recommend adding some cloth or cotton material wrapping to prevent damage to the equipment caused by low temperatures.
•⭐Devices need to be plugged in to be networked.

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$329.99

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FRIZZLIFE

Frizzlife PLC10 Replacement Filter For FK99/FP99/SW10/SW10F Under Sink Water Filter

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Two-Stage Advanced Purify: 2 in 1 TWO-STAGE compoud filter, sediment filter cartridge with 5 micron precision reduces particle material such as sand, silt and rust from the water. Block carbon filter cartridge with 0.5 micron precision that reduces 99.99% of Lead, Chlorine, Odor and Particles from the water.
•High Benefits: The Frizzlife under sink water filter has unique technology that removes over 99.99% of contaminants while leaving in all essential minerals, which are vital to your health, including calcium, potassium, and magnesium. Enjoy pure and healthy water from the tap.
•Compatible Replacement Filter for Frizzlife under sink water filtration systems: FK99/FP99/SW10/SW10F. It's the only core filter cartridge you will need to replace which is eco-friendly. If you found the inner core replacement is rather difficult, you could search the cartridge with filter loaded(ASIN:B09SZ8DVR2) and to replace it in a more easier way.
•Long Service & High Flow Rate: Quick change filter replacement that lasts 1 years or 1,600 gallon of water, provide your family a clear, clean, lead free, odorless water. Enjoy tap water as pure and healthy as spring water.

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$19.99

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FRIZZLIFE

FRIZZLIFE ASR313-A Replacement Filter Cartridge for PX500/PX500-A (3rd Stage) - Remineralization Alkaline Filter

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•【Advanced Post Activated Carbon Filter with Natural Mineral Ingredients】The post activated carbon filter utilized NSF certified material imported from Japan and Swiss that could further remove contaminants and largely improve the water taste. It also blends 100% natural mineral ingrediants into the carbon block.
•【Alkaline & Remineralization】 The ASR313-A post filter move one step beyond water filtration to long term health. It could adjust pH level of pure water to slightly alkaline by restoring essential minerals and ions.
•【Compatibility】3rd stage replacement filter for Frizzlife PX500(B08R8G8M8Q) / PX500-A(B08R8FD43K) undersink reverse osmosis water filter system.
•【Quick Change & Tool Free】: ASR313-A Replacement Post Filter can be replaced only with one single turn after shutting off the power supply. Super easy replacement requires NO tools and saves your time and energy.
•【Long Service Life】 Please replace the ASR313-A filter per year of usage. (Please kindly note that the replacement period highly depends on your feed water quality and daily water usage), To get the best filtered water, please replace the filter according to ther replacement cycle.

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$29.99

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FRIZZLIFE

Frizzlife Pressure Mini Water Tank for All Tankless Reverse Osmosis System, Small Water Storage Tank for PD600, PX500A, PD800, PD1000, PD400, G3P600, G3P800, G2, Fit 1/4” & 3/8” Water Tubing RO system

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•[Innovative Solution for Tankless RO systems] The tiny water storage tank is specifically designed to effectively solve the inherit drawbacks of tankless RO systems: a) occasional pulsing of the system caused by unstable water pressure, especially when it is connected to a refrigerator or long distance point of use. b) initial time lag of water output of tankless reverse osmosis system. c) Get water fast from refrigerator without wait.
•[Super Easy to Install: Following clear user manual, the mini water tank is super easy to be installed with 1/4” quick connect design. Simply cut off your outlet water line of the RO system and insert the tank in between the cut. The package includes a blade, a 3 way quick fitting, a ball valve, a tank, and a tank base. Everything needed for installation is included.
•[Durable & Guaranteed]: The stylish small water storage tank in black has been rigorously tested for tank integrity, pressure resistance, durability and material safety. It is warrantied for 1 year of usage.
•[Premium Quality and Safe] Made by 100% food grade materials, the mini tank is fully recyclable, 100% safe to preserve effective amount of water. Although at pocket size, it’s sturdy and strong enough to persist to high pressure.
•[Water Storage Tank Dimensions]: The mini water tank (4.5”x 4.5” x 8.3”) caters to the design concept of tankless reverse osmosis system which is compact and sleek enough to fit under almost all of the kitchen sinks. Perfectly fits for G3, G2, G3P600, G3P800, G2P600, D6, D4, P600, RO500, KFL-X6, PL400G, CUW4, tankless RO systems.

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$29.99

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FRIZZLIFE

Frizzlife DS99 Countertop Water Filter System, NSF 42&372 Certified 8-Stage Stainless Steel Water Filter for Sink Faucet, 0.5 Micron Filter Reduces 99.99% Lead, Chlorine, Heavy Metals, Bad Taste&Odor

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•【Suitable Thread Size】Our product offers 6 connectable sizes:MALE:3/4"-27, 13/16"-27, 55/64"-27, 15/16"-27; FEMALE:3/4"-27, 55/64"-27, will fit most American faucets. NOTE: Please check if your faucet fits with Frizzlife DS99 sink water filter system first. If the included adapters don't fit, please contact us for more adapters.
•【NSF Certified 8-Stage Deep Filtration】The 1st stage of Frizzlife DS99 dual-stage countertop water filter system adopts high-grade PP membrane and activated coconut shell carbon block, which also blended with KDF. The 2nd stage features with 0.5 micron filtration precision, by combining carbon block and lead removal ingredients, it can effectively reduce Lead, Chlorine, Fluoride, Heavy Metals, VOCs, bad taste & odor and other harmful contaminants from tap water. The essential minerals are still kept in the filtered water.
•【Safe, Durable Materials & Reinforced Construction】Frizzlife DS99 countertop water filtration system is made from food-grade and lead-free 304 stainless steel. By only using safe and reliable materials, DS99 countertop water purifier is designed for healthy and fresh water. The thickened filter housings (1mm) are corrosion-resistant, durable and can be used for years. The whole system has passed 100,000 times water hammer test and 10,000 times pulse tests. No more burst concern.
•【Easy to Install & No Drilling Required】The installation is effortless. Directly attach the hose provided to the existing sink tap, that’s everything! Tap water and filtered water can be easily switched in a snap. Besides, it produces ZERO waste water and does NOT require electricity to work. DS99 faucet water filter does NOT require to drill a hole on the granite, which makes it an ideal choice for multiple usage scenarios like rental apartment, RVs, office, travelling etc..
•【Ultra Fast Flow & Great Compatibility】DS99 stainless steel water filtration delivers ultra fast water flow, which can reach 2 gallons per minute @ 60 psi. You can also collect a 8oz cup of filtered water within 2-3 seconds. The clean water is so easily accessible. DS99 drinking water filter is compatible with most standard faucets, it comes with a variety of adapters to match different faucet thread sizes. Please don’t forget to remove the aerators from the faucet before proceeding.
•【Last for Long & Quick Replacement】The 1st stage filter can last up to 8 months, and the 2nd stage can last up to 12 months or 8,000 gallons of filtered water (Actual filter life may vary based on your feed water quality and daily water usage). You don’t need to replace the entire stainless steel housings but only the inner core filter cartridges, thus saves up the plastic wastes. Search “DSF01” and “DSF02” for replacement filters.

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$109.99

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