Best Replacement Under Sink Water Filters 2026

Advertising Disclosure

Last Updated - 03.02.2026

Best Choice

01

SYGOODLIFE

SYGOODLIFE 3-Stage Under Sink Water Filter System, Reduces Hardness of Water, Reduces Fluoride, Chlorine, Bad Taste & Heavy Metals, NSF 42 Certified

Show more
9.9

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Multi-stage filtration: SY-M3-CF under sink water purifier comes with 9-stage filters, to effectively reduce harmful impurities such as PFAS, PFOA/PFOS, residual chlorine, fluoride, heavy metals, sediment, rust, and other harmful contaminants.
Intuitive water quality: the first level adopts a semi-transparent design, which allows for observation of changes in water quality
Install in 3 minutes, change cartrels in 3 seconds: the under-sink water filtration system installs in less than 3 minutes and can be placed or wall-mounted. In addition, the twist-lock design allows you to change each filter in just 3 seconds.
Compact design, easy installation: the space-saving design allows the water purifier to fit neatly under all types of sinks, leaving plenty of room for other plumbing and storage needs. Its quick-connect fittings can be installed directly, and one person can easily install it at home without hiring a professional.

99,99 €
Value for Money

02

FRIZZLIFE

Frizzlife SW20 Under Sink Water Filter System, NSF/ANSI 53&42 Certified, 0.5 Micron Reduces 99.99% Lead, Chlorine, Bad Taste & Odor, Direct Connect Water Filter, 3 Year High Capacity

Show more
9.8

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

【3 Seconds Replacement & 4X Longer Life】Each filter cartridge is able to provide clean and safe drinking water for 24-36 months, the filter life is almost 4x longer than most carbon water filters on the market. Thanks to the advanced auto shut-off design, the replacement work requires only a simple twist and can be finished in no time at all without cutting off the water supply. Search "FRIZZLIFE PLC20" for replacement filters.
【3 MINUTES INSTALLATION & STURDY CONSTRUCTION】Compatible with standard US kitchen sink (both 3/8" NPT and 1/2"). The system comes with a 3/8" braided material inlet hose and should be connected directly to the existing faucet hose. The installation process is DIY friendly and takes only 3 minutes! Unlike other brands use cheap and fragile plastic fittings, FRIZZLIFE SW20 water filtration uses durable, lead-free brass fittings. No more cracking or leaking nightmare
Save money and eco choice: Instead of throwing away the entire plastic housing, FRIZZLIFE SW20 only needs to replace the inner core filter cartridge, which remarkably reduces plastic waste and reduces future replacement costs. In addition, the system does not produce wastewater. Save your water costs and make drinking water much cheaper. This is indeed a cost-effective water solution in the long run.
MULTI-LAYER FILTRATION Equipped with innovative multi-stage filtration technology, FRIZZLIFE SW20 extrudes under sink water filtration system NSF 42 & 53 certified filter elements, combining sediment filter and coconut carbon block filter into one composite filter with 0.5 micron filtration accuracy. It can effectively reduce chlorine, lead, fluoride, heavy metals, VOCs, bad taste and odor and other harmful impurities from water.
Fast water flow and versatile: The flow rate of SW20 under counter water filter system can reach up to 2 gallons per minute at 60 psi. Fast and stable water flow ensures a good development of the system for both domestic and commercial use. The under-sink water filtration can be installed in your kitchen, office, bathroom, RV and much more. With the help of the IMC-2 Ice Cube Maker Set (B07RBMLR26), it can simultaneously supply purified water for your kitchen sink and refrigerator/ice maker.

99,99 €
03

SYGOODLIFE

SYGOODLIFE SY-PP Under-Sink Water Filter Replacement Cartridge for SY-M3-CF 3-Stage Water Filter System

Show more
9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

【Caution】Designed for Municipal Tap Water Only: This product is specifically engineered for municipal tap water and cannot filter well water or hot water. Using well water or hot water as a water source is strictly prohibited.
Translucent cylinder: can visually see the pollution situation of the filter element
Premium materials: Under-sink PP filter employs advanced PP membrane to effectively block sand, rust, particles, suspended solids, and other impurities. Internal structure: 1. PP cotton: Filters large particles like sand, rust, and silt. 2. Resin layer: Softens water quality. 3. Non-woven fabric. 1+1+1= 3 layers
Extended lifespan: the under-sink replacement pre-settling filter delivers clean filtered water for 6-8 months. Actual results vary based on local water quality. For optimal filtration performance, replace the filter according to the recommended lifespan.
Easy installation and no extra tools: twist-lock design allows filter cartridge replacement in just 3 seconds without tools. Save your time and energy

28,99 €
04

AQUA CREST

AQUA CREST 3US-PF01 Under Sink Water Filter, NSF 42 Certified Replacement for Advanced 3US-PF01, 3US-MAX-F01H, 3US-PF01H, Delta RP78702, Manitowoc K-00337, K-00338 Water Filter (Pack of 1)

Show more
9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Stable Flow Rate:Provide you with stable filtered water without obvious pressure drop. Filtration is efficient enough to give you the best drinking experience. Pressure drop. Filtration is efficient enough to give you the best drinking experience.
Safe material: uses food-safe plastic housing. It can prevent bursting to provide you with a satisfactory and safe experience. Specially selected premium materials are fully certified by the WQA to NSF 372 standard.
NSF Certified Performance: NSF 42 Certified. The highly efficient filtration is designed to provide you with an excellent water experience.
Long service life: Enjoy fresh water by replacing your filter every 6 months or 2,000 gallons. Depending on what comes first, varies depending on water quality.
Compatible with the following models: 3M Filtrete 3US-PF01, 3US-MAX-F01, 3US-PF01H, 3US-MAX-F01H, Fits Filtrete Maximum Filtration, 3US-PS01, 3US-MAX-S01 systems; Fits 3M HF25, HF25-S, HF25-MS; Fits Delta RP787000 . 2, Manitoblau WOC K-00337, K-00338; Fits AR10000 water filter systems. Aquacrest is an independent brand. This filter is not an original product. Please note that the compatible model numbers of the products are quite similar.

35,05 €
05

SYGOODLIFE

SYGOODLIFE SY-CB Under-Sink Water Filter Replacement Cartridge for SY-M3-CF 3-Stage Water Filter System

Show more
9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

【Caution】Designed for Municipal Tap Water Only: This product is specifically engineered for municipal tap water and cannot filter well water or hot water. Using well water or hot water as a water source is strictly prohibited
Premium materials: under-sink filter utilises advanced imported activated carbon to remove colour and odour, enhancing button. Internal layers: (1) Activated carbon block: removes colour and odour, improves taste. (2) Non-woven fabric (3) 1+1= 2 layers.
Extended lifespan: the under-sink replacement pre-settling filter provides 12-18 months of clean filtered water. Actual results vary by local water quality. For optimal filtration, replace the filter according to the recommended lifespan.
Easy installation and no extra tools: twist-lock design allows filter cartridge replacement in just 3 seconds without tools. Save your time and energy

39,99 €
06

SYGOODLIFE

SYGOODLIFE SY-CK Under-Sink Water Filter Replacement Cartridge for SY-M3-CF 3-Stage Water Filter System

Show more
9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

【Caution】Designed for Municipal Tap Water Only: This product is specifically engineered for municipal tap water and cannot filter well water or hot water. Using well water or hot water as a water source is strictly prohibited.
Premium materials: Under-sink filter utilises advanced activated carbon to effectively remove chlorine, odours/tastes, volatile organic compounds (VOCs), and certain heavy metals. Internal structure:(1) Activated Carbon (CTO): Removes chlorine, odors/tastes, and VOCs. (2) KDF - Reduces heavy metal content. (3) Fluoride removal media: Eliminates fluoride. (4) Non-woven fabric. 1+1+1+1=4 layers.
Extended lifespan: the under-sink replacement pre-settling filter delivers clean filtered water for 8-12 months. Actual performance varies by local water quality. For optimal filtration, replace the filter according to the recommended lifespan.
Easy installation and no extra tools: twist-lock design allows filter cartridge replacement in just 3 seconds without tools. Save your time and energy
Crack-resistant and leak-proof: Countertop sealed filter constructed from durable materials resists cracking or leakage. Integrated design eliminates breeding grounds for harmful contaminants, freeing you from replacing bottom seals

39,99 €
07

SYGOODLIFE

UF Ultrafiltration Replacement Filter for SYGOODLIFE SY-U50 Under-Sink Water Purifier, 3rd Stage 0.01μm Core Filter (Retains Beneficial Minerals)

Show more
9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Food-grade durable membrane material: made of food-grade ultrafiltration membrane (compliant with drinking water safety standards), it has no harmful leaching and maintains stable filtration performance over time, avoiding rapid membrane clogging.
Core 3rd stage compatibility with SY-U50: Exclusively engineered for the SY-U50's 3rd stage core filtration slot—the heart of the unit's 6-stage precision system. It matches the original ultrafiltration accuracy, ensuring consistent performance with the SY-U50's design.
Aligns with SY-U50's eco-friendly design: it fully adapts to the SY-U50's "no electricity, zero waste water" design. No external power is needed, and no waste water is generated—achieving deep purification while retaining the unit's energy-efficient, eco-friendly attributes.
3-step quick replacement (no expertise needed): Follows the SY-U50's "unlock → replace → fast" process. Even first-time users can swap it in 3 minutes—no tools or professional skills required, upholding the unit's easy-maintenance trait.
0.01 μm precision filtration (Retains Minerals): Equipped with a 0.01 μm ultrafiltration membrane, it removes 99% of bacteria, tiny particulates (fine sediment, colloids), and residual contaminants. Critically, it retains beneficial natural minerals (calcium, magnesium)—echoing the SY-U50's "clean + nutrient-rich" core selling point.

34,54 €
08

AQUA CREST

Aquacrest GXRLQR Under Sink Inline Water Filter, NSF 42 Certified, Replacement for GE SmartWater Twist and Lock In-Line GXRLQR Water Filter (Pack of 1)

Show more
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

NSF 53 certified to reduce lead by 99.6%, cysts by 99.99%, benzene by 96.6%, carbofuran by 98.4%, endrin by 96.6%.
NSF 42 certified for better tasting water by reducing chlorine, taste and odor
NSF 401 certified to BPA by 99.2%, estron by 96.6%, phenytoin by 95.2%, ibuprofen by 94.4%, naproxen by 96.2%, nonylphenol by 97.2%
NSF 372 certified lead free material
International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

30,99 €
09

FRIZZLIFE

Frizzlife SW20 Under Sink Water Filter System, NSF/ANSI 53&42 Certified, 0.5 Micron Reduces 99.99% Lead, Chlorine, Bad Taste & Odor, Direct Connect Water Filter, 3 Year High Capacity

Show more
8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

【3 Seconds Replacement & 4X Longer Life】Each filter cartridge is able to provide clean and safe drinking water for 24-36 months, the filter life is almost 4x longer than most carbon water filters on the market. Thanks to the advanced auto shut-off design, the replacement work requires only a simple twist and can be finished in no time at all without cutting off the water supply. Search "FRIZZLIFE PLC20" for replacement filters.
【3 MINUTES INSTALLATION & STURDY CONSTRUCTION】Compatible with standard US kitchen sink (both 3/8" NPT and 1/2"). The system comes with a 3/8" braided material inlet hose and should be connected directly to the existing faucet hose. The installation process is DIY friendly and takes only 3 minutes! Unlike other brands use cheap and fragile plastic fittings, FRIZZLIFE SW20 water filtration uses durable, lead-free brass fittings. No more cracking or leaking nightmare
Save money and eco choice: Instead of throwing away the entire plastic housing, FRIZZLIFE SW20 only needs to replace the inner core filter cartridge, which remarkably reduces plastic waste and reduces future replacement costs. In addition, the system does not produce wastewater. Save your water costs and make drinking water much cheaper. This is indeed a cost-effective water solution in the long run.
MULTI-LAYER FILTRATION Equipped with innovative multi-stage filtration technology, FRIZZLIFE SW20 extrudes under sink water filtration system NSF 42 & 53 certified filter elements, combining sediment filter and coconut carbon block filter into one composite filter with 0.5 micron filtration accuracy. It can effectively reduce chlorine, lead, fluoride, heavy metals, VOCs, bad taste and odor and other harmful impurities from water.
Fast water flow and versatile: The flow rate of SW20 under counter water filter system can reach up to 2 gallons per minute at 60 psi. Fast and stable water flow ensures a good development of the system for both domestic and commercial use. The under-sink water filtration can be installed in your kitchen, office, bathroom, RV and much more. With the help of the IMC-2 Ice Cube Maker Set (B07RBMLR26), it can simultaneously supply purified water for your kitchen sink and refrigerator/ice maker.

79,99 €
10

SYGOODLIFE

CTO Compressed Carbon Replacement Filter for SYGOODLIFE SY-U50 Under-Sink Water Purifier, 2nd-Stage Chlorine & Odor Removal Filter

Show more
8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

【Synergizes with SY-U50’s Filtration Chain】It takes over from the 1st-stage PPC filter to refine water quality and enhance taste, working with the 3rd-stage UF filter to deliver the fresh, pleasant drinking water the SY-U50 is known for.
【Precise 2nd-Stage Fit for SY-U50】Exclusively designed for the 2nd-stage filtration slot of the SY-U50 purifier. It integrates seamlessly with the unit’s integrated waterway design, ensuring stable water flow and preserving the SY-U50’s anti-leak performance.
【Leak-Proof & Safe Carbon Structure】Its compressed carbon design prevents carbon powder leakage, ensuring post-filtration water purity. The material meets food-grade safety standards, with no harmful releases during use.
【Deep Adsorption with Premium Coconut Shell Carbon】Made of high-porosity coconut shell compressed activated carbon (large adsorption surface area), it removes 99% of chlorine, fluoride, organic contaminants, odd colors, and odors (e.g., moldy/metallic tastes), drastically improving water palatability.
【3-Step Hassle-Free Replacement】Matches the SY-U50’s user-centric “unlock → replace → fasten” process. No disassembly of complex parts is required—complete the swap in minutes, retaining the unit’s no-professional-maintenance benefit.

34,54 €