Alkaline Water Filter Systems 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 โ 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 (Caยฒโบ), magnesium (Mgยฒโบ), and potassium (Kโบ). 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
Waterdrop20% OffWaterdrop G3P600 Reverse Osmosis System, 8 Stage Tankless Reverse Osmosis Water Filter, NSF/ANSI 42 & 58 & 372 Certified, Under Sink RO System, 2:1 Pure to Drain, Smart LED Faucet
9.5 Instruction9.5 Flavor9.3 Easy installationWhy we love it
Certified for safe, lead-free water.
Compact design saves under-sink space.
Easy filter changes without tools.
9.7Exceptional
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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.
9.6Exceptional
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4
EXPRESS WATERExpress Water Reverse Osmosis Alkaline Water Filtration System โ 10 Stage RO Water Filter with Faucet and Tank โ Under Sink Water Filter with Alkaline Filter for Added Essential Minerals โ 50 GPD
Why we love it
Effectively purifies water.
Easy to install.
Customizable with extra filters.
9.3Excellent
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5
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.
9.1Excellent
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6
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- ๐-๐๐ญ๐๐ ๐ ๐๐ซ๐๐๐ข๐ฌ๐ ๐ ๐ข๐ฅ๐ญ๐ซ๐๐ญ๐ข๐จ๐ง: 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
- ๐๐๐๐๐๐ ๐๐ข๐ ๐ก-๐๐ฉ๐๐๐ ๐ ๐ฅ๐จ๐ฐ: 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
- ๐:๐ ๐๐ฎ๐ซ๐-๐ญ๐จ-๐๐ซ๐๐ข๐ง ๐๐๐ญ๐ข๐จ: 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
- ๐.๐๐๐๐ฮผ๐ฆ ๐๐ + ๐๐๐๐๐ ๐๐ข๐ง๐๐ซ๐๐ฅ๐ฌ: The G5P700A combines a precise 0.0001ฮผm RO membrane with alkaline mineralization technology, effectively reducing particles larger than 0.0001ฮผm while enriching water with essential minerals like Caยฒโบ, Mgยฒโบ, Naโบ and Kโบ
- ๐๐จ๐ฆ๐ฉ๐๐๐ญ ๐๐๐ง๐ค๐ฅ๐๐ฌ๐ฌ ๐๐๐ฌ๐ข๐ ๐ง: Say goodbye to large tank systems. The tankless RO systemโs 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
8.8Very Good
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7
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.
8.7Very Good
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8
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.
8.6Very Good
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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- ๐-๐๐ญ๐๐ ๐ ๐๐ซ๐๐๐ข๐ฌ๐ ๐ ๐ข๐ฅ๐ญ๐ซ๐๐ญ๐ข๐จ๐ง๏ผThe 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
- ๐๐๐๐๐๐ ๐๐ข๐ ๐ก-๐๐ฉ๐๐๐ ๐ ๐ฅ๐จ๐ฐ๏ผWith 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
- ๐:๐ ๐๐ฎ๐ซ๐-๐ญ๐จ-๐๐ซ๐๐ข๐ง ๐๐๐ญ๐ข๐จ๏ผThis 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
- ๐.๐๐๐๐ฮผ๐ฆ ๐๐ + ๐๐๐๐๐ ๐๐ข๐ง๐๐ซ๐๐ฅ๐ฌ๏ผThe G5P500A combines a precision 0.0001ฮผm RO membrane with Alkaline mineralization technology, effectively reducing particles larger than 0.0001ฮผm while enriching water with essential minerals like Caยฒโบ, Mgยฒโบ, Naโบ and Kโบ
- ๐๐จ๐ฆ๐ฉ๐๐๐ญ ๐๐๐ง๐ค๐ฅ๐๐ฌ๐ฌ ๐๐๐ฌ๐ข๐ ๐ง๏ผSay goodbye to large tank systems. The tankless RO systemโs 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
8.5Good
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10
NU Aqua20% OffNU Aqua 7-Stage (12 Step Filtration) UV & Alkaline Under Sink Reverse Osmosis Water Filter System - 100 GPD RO Filtration & Remineralization - 100GPD Undersink - Home Kitchen Drinking Purifier
Main highlights- SUPERIOR UV WATER FILTRATION: Our UV & HydraCoil membrane filters utilize a special manufacturing process for up to 50% cleaner water than other ro systems. Our carbon filters provide a higher absorption rate, due to the molecular structure of the pores, which allows even the smallest of particulates to be efficiently removed from your water. NU Aqua Reverse Osmosis Systems to provide up to a 99% rejection rate of 1000+ pollutants such as arsenic, chlorine, fluoride, and lead
- PREMIUM QUALITY WATER: NU Aqua under sink reverse osmosis drinking water filtration systems have gone through rigorous development & testing in our lab to provide consistent great tasting, clean & healthy purified water on demand. Our RO Drinking Water Systems feature professional grade high-quality quick connect fittings, an elegant NSF 100% lead-free designer stainless steel countertop faucet, and double o-ring sealed filter housings
- EASY INSTALLATION GUIDE + BONUS PPM METER: Experience the convenience of our reverse osmosis water filter system with our user-friendly installation manual. Setting it up is a breeze & takes less than an hour. Our innovative design includes color-coded tubing & quick-connect fittings to effortlessly fit under any standard kitchen sink (undersink). Plus, as a bonus, each reverse osmosis system includes a complimentary PPM meter for easy water quality testing
- 120-DAY HOME TRIAL & 3 YEAR WARRANTY: If you're not satisfied with your 7 stage UV & Alkaline reverse osmosis system within the first 120 Days, send your RO Water Filter System back. Backed by an industry leading 3 year manufacture warranty and lifetime support the NU Aqua Platinum Reverse Osmosis Under Sink Water Filter Systems comes with the industry's best support and a satisfaction guarantee
- 100 GPD HIGH FLOW RATE: At 100GPD our reverse osmosis tank system doubles the output of standard under sink drinking water filter systems while increasing pollutant rejection rates. Our NU Aqua Under-sink RO system eliminates harmful minerals and other impurities, delivering a clean, refreshing taste that surpasses that of bottled or pitcher-filtered water
8.4Good
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