System Alkaline Water Filters of 2025
Best Choice1
Clicked 9 times in the last monthSimPureSimPure Y9A Countertop Reverse Osmosis Water Filter, Alkaline Remineralization 300 GPD 6 Stage Purification, RO Water Filtration System, Super Fast Filtering Portable Water Purifier
Main highlights- STERILIZATION & 6-STAGE ADVANCED PURIFICATION: The Y9 Series RO Water Filtration System features a 6-stage filtration system with sterilization, effectively removing 99.99% of over 1,000 harmful contaminants, including viruses, bacteria, chemicals (PFAS/PFOA/PFOS, pharmaceuticals), heavy metals (lead, arsenic), chlorine, fluoride, nitrates, and more. Say goodbye to the hidden dangers of tap water for a cleaner, safer drinking experience
- 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)
- REDUCE PLASTIC WASTE & SAVE COSTS: By reducing the need for bottled water, SimPure Y9 Series countertop water filter helps you save up to 6,000 bottles per filter replacement, offering a sustainable, cost-effective solution for hydration. Say goodbye to plastic bottles and the harmful chemicals they may contain
- ENHANCED FILTRATION WITH MINERALIZATION: The SimPure Y9A uses advanced reverse osmosis technology, followed by a post-mineralization filter that adds essential minerals like calcium (Ca²⁺), magnesium (Mg²⁺), and potassium (K⁺). This enhances the taste of the water while promoting better hydration and supporting bone and heart health
- EASY WATER TANK REPLACEMENT: The Y9 Series Water Filter features a side-placed water tank, making water replacement simple and convenient, unlike traditional systems with rear-placed tanks that are harder to access
- COMPACT DESIGN WITH EASY INSTALLATION: The Y9 Series RO water filter fits neatly in kitchens, apartments, and offices. It is designed for ZERO installation, offering convenience without requiring complex setup
- 300 GPD HIGH CAPACITY FILTRATION: The Y9 Series System filter 300 gallons per day (GPD), far surpassing the typical 50-100 GPD of most countertop systems, providing a fast, continuous supply of clean water
9.9Exceptional
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Value for Money2
WaterdropWaterdrop 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
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
- 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
- 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
9.6Exceptional
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3
iSpring13% OffiSpring 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
9.7 Flavor9.5 Simple to use9.3 lasts a long timeWhy we love it
Produces great-tasting water.
Easy DIY installation.
Exceptional customer support.
9.5Excellent
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4
EXPRESS WATERExpress Water Reverse Osmosis Alkaline Water Filtration System – 10 Stage RO Water Filter with Faucet and Tank – Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 50 GPD
Why we love it
Effectively purifies water.
Easy to install.
Customizable with extra filters.
9.2Excellent
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5
SimPure31% OffSimPure Alkaline UV Reverse Osmosis System T1-400ALK, NSF/ANSI 58 Certified, Tankless RO Water Filter System 400 GPD, pH+ Remineralization Water Filtration Under Sink, BPA Free, Built-in Pump
Why we love it
Removes 99.99% of contaminants.
Space-saving tankless design.
Enhances water with essential minerals.
9.1Excellent
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6
APEC WATERAPEC Water Systems ROES-PH75 Essence Series Top Tier Alkaline Mineral pH+ 75 GPD 6-Stage Certified Ultra Safe Reverse Osmosis Drinking Water Filter System with Extra High Capacity Filter Set Stage 1-3
Why we love it
Removes 99% of water impurities.
Easy installation with basic tools.
Enhances water taste with added minerals.
9.0Excellent
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7
Invigorated WaterpH Recharge Glass Alkaline Water Filter Dispenser - Countertop Water Filter System - Purifier Pitcher for Home and Office - High pH Pure Drinking Water Filtration - 8.5L/2.25 Gal
9.5 Durability9.3 Sheerness8.7 materials QualityWhy we love it
Increases water pH to pH9.
Stylish, modern design.
Reduces plastic bottle usage.
8.7Very Good
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8
Bluevua22% OffBluevua RO100ROPOT-UV Reverse Osmosis System Countertop Water Filter - 6 Stage Purification with UV and Remineralization, Counter RO Filtration, Portable Water Purifier
Why we love it
No plumbing required, easy setup.
Efficient 4-stage filtration.
Long filter life, up to 24 months.
8.5Good
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9
WaterdropWaterdrop G5P500A Alkaline Mineral pH+ Reverse Osmosis Water Filter, NSF/ANSI 372 Certified, 8 Stage Reverse Osmosis System, 500G RO Water Filtration System, 2:1 Pure to Drain, Reduces TDS, BPA Free
Main highlights- 𝟖-𝐒𝐭𝐚𝐠𝐞 𝐏𝐫𝐞𝐜𝐢𝐬𝐞 𝐅𝐢𝐥𝐭𝐫𝐚𝐭𝐢𝐨𝐧：The reverse osmosis system features an advanced 8-stage filtration process that reduces harmful contaminants such as PFOA, PFOS, chlorine, lead, fluoride, heavy metals, and other impurities. Meanwhile, Waterdrop G5P500A delivers clean, safe water free from unpleasant tastes or odors
- 𝟓𝟎𝟎𝐆𝐏𝐃 𝐇𝐢𝐠𝐡-𝐒𝐩𝐞𝐞𝐝 𝐅𝐥𝐨𝐰：With a robust 500GPD (gallons per day) capacity, the G5P500A provides a consistent and rapid water flow, filling a 6-ounce cup in just 8 seconds. Enjoy immediate access to purified water, ideal for busy households
- 𝟐:𝟏 𝐏𝐮𝐫𝐞-𝐭𝐨-𝐃𝐫𝐚𝐢𝐧 𝐑𝐚𝐭𝐢𝐨：This RO water filtration system 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 wastage
- 𝟎.𝟎𝟎𝟎𝟏μ𝐦 𝐑𝐎 + 𝐀𝐝𝐝𝐞𝐝 𝐌𝐢𝐧𝐞𝐫𝐚𝐥𝐬：The G5P500A combines a precision 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
8.4Good
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10
WaterdropWaterdrop TSB-ALK 8 Layer High Capacity Slightly Alkaline Under Sink Water Filter, Reduces PFAS, PFOA/PFOS, Fluoride, Chlorine, Bad Taste & Odor, with Dedicated Faucet, Under Sink Water Filter
Main highlights- [No Clogging Issues] This under sink water filter features an upgraded filtration area that offers a 20X increase in dirt adhesion. This significant boost enhances filtration capability, effectively trapping more impurities and reducing the risk of clogging. Enjoy consistently cleaner water with less maintenance hassle, ensuring a smooth and worry-free experience for you and your family.
- [Long Filter Lifespan] Enjoy pure water all year round. The 3 high-quality filters in this under sink water filter have impressive lifespans, lasting up to 12 months. This means fewer replacements and more convenience for you. Say goodbye to frequent filter changes and hello to long-lasting, clean water every day. Before going on vacation, please Put the filters in separate sealed plastic bags, and store the bags in your refrigerator (NOT the freezer) to keep it fresh in 30 days.
- [Fantastic Taste, Better Health] This alkaline under sink water filter enriches your tap water with beneficial minerals such as calcium, magnesium, sodium, and potassium, enhancing its taste. These added minerals not only make your water taste better but also support your physical health, improving bone strength and digestive health. Enjoy healthier, great-tasting water straight from your tap. Note: Do not reduce TDS.
- [Easy to Install] Installation is a breeze! With twist-and-lock design, you can set it up in 3 minutes and replace filters in just 3 seconds all by yourself without a plumber.
- [8-stage Advanced Filtration] This under sink water filtration system includes 3 filters for 8-stage deep filtration, including alkaline filtration, to reduce chlorine, taste and odor, fluorides, heavy metals, rust, sediment, sand and particles, tested by a third-party lab. Its KDF materials reduce heavy metals and harmful substances, ion exchange resin reduces fluorides, and the alkaline filter enriches your tap water with beneficial minerals and improves taste, offering pure, healthy water.
8.3Good
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