All reverse osmosis systems (such as under sink RO, countertop RO, and tankless RO) are known for removing beneficial minerals that are important to our bodies, leaving you with unnatural and slightly acidic water. Therefore, adding an alkaline remineralizing filter to your reverse osmosis system helps increase the pH level of your water and restore those healthy minerals. This, therefore, provides more natural and alkaline water. In this article, you’ll find the best alkaline reverse osmosis system.
Comparisons
What is the alkaline reverse osmosis system?
Most reverse osmosis systems go through the common 4-stage purification process, but through the process, important minerals like calcium, potassium, sodium, phosphorus, chloride, and magnesium are removed.
Since these minerals are essential to our health and our body does not produce them naturally, we need to find a way to restore them.
Adding a remineralization filter to our reverse osmosis system is one way to restore minerals in your water, and that’s where the alkaline reverse osmosis system comes in.
Alkaline reverse osmosis is a system with an alkaline filter for added essential minerals.
Our top pick
- iSpring RCC1UP-AK 100GPD High Capacity
- Express Water Reverse Osmosis Alkaline Water Filtration System – 10 Stage
- APEC Top Tier Supreme Certified Alkaline Mineral (ULTIMATE RO-PH90)
- SimPure Alkaline Reverse Osmosis Water Filtration System
- Rinkmo Alkaline Reverse Osmosis Water Filtration System
- Reverse osmosis revolution Alkaline (raise pH level)
- Frizzlife RO Reverse Osmosis Water Filtration System
- Ukoke RO75GP 6 Stages Reverse Osmosis Water Filtration System
- AlcaPure Zero Installation Purifier Reverse Osmosis Countertop Water Filter
- NU Aqua Platinum Series 100GPD Under Sink Reverse Osmosis Drinking Water Filtration System – Premium Water Filter (6 Stage Alkaline)
Alkaline reverse osmosis system reviews
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The iSpring RCC1UP-AK is equipped with a booster pump and filters water in the 7-stage water purification process. The stages are:
3 pre-filters: PP sediment filter, Carbon KDF (GAC) filter, and Carbon block (CTO) filter. The pre-filter helps remove large contaminants and protects the RO membrane from chemicals like chlorine and chloramines.
Pollutants as small as 0.0001 microns are filtered out by reverse osmosis (RO) filters.
It is a fine GAC filter that provides final polishing before the purified water is delivered to the faucet.
It also has an 11-watt ultraviolet sterilization stage that helps kill viruses and bacteria.
The alkaline remineralization filter stage helps restore healthy minerals and a natural alkaline balance, while also producing a more natural taste.
It operates at a maximum feed water temperature (F) of 100 and a maximum feed water pressure (psi) of 80.
The RO membrane provides 100 gallons of water per day and filters down to 0.0001 microns.
The system has an alkaline remineralization filter that helps balance pH and reintroduces healthy ionized minerals, as well as an 11-watt ultraviolet sterilizer that helps kill viruses and bacteria. The UV sterilizer powers on and off with water flow.
Ispring products are tested annually to remove up to 99.99% of harmful contaminants that commonly appear in municipal and well water. Also, the filters, tanks, tubing, and other water-contacting parts are manufactured to strictly comply with NSF/ANSI standards (58 for reverse osmosis).
It has a transparent first-stage house. The transparent housing provides an easy way to visually inspect the sediment filter, view contaminants removed from your water, and know when it is time to change the filter.
More Ispring system with alkaline remineralization filter
iSpring PH100 Top Quality 6-Stage
- Stage-6
- GPD-100 gallon
- Tank size: 3.2 gallons pressurized
- pure to wastewater ratio of 1: 1.
- Incoming water pressure is 45-70 psi.
- Temperature range: 40–100 °F
- Maximum TDS-750 ppm
- Remineralization
iSpring RCC7P-AK Boosted Performance Under Sink 6-Stage
- Stage-6
- GPD-75 gallon
- Tank size: 3.2 gallons
- pure to wastewater ratio of 1: 1.
- Incoming water pressure is 30–70 psi.
- Temperature range: 40–100 °F
- Maximum TDS-750 ppm
- Remineralization
- Replacement filter
iSpring F4 for Standard Reverse Osmosis RO Systems with Post Carbon
iSpring MC7 Reverse Osmosis (RO) Membrane Replacement 75 GPD
iSpring FA15 Alkaline Replacement Water Filter Cartridge
- Stage-6
- GPD-75 gallon
- Tank size: 3.2-gallon pressurized tank and 2.5-gallon holding capacity
- Filtered water to wastewater ratio of 1:3
- Remineralization
iSpring Alkaline Replacement Water Filter Cartridge
iSpring FA15 -10-inch Inline Quick Connect 3-Layer Alkaline Replacement Water Filter Cartridge with Mineral Balls, Calcite, and Corosex for Reverse Osmosis RO System.
iSpring MC7 Reverse Osmosis (RO) Membrane Replacement, 75 GPD, 11.75” x 1.75”, Blue
iSpring F9K 1-Year Replacement Supply Filter Cartridge Pack Set for 6-Stage Alkaline Mineral Reverse Osmosis RO Systems, White
iSpring RCC7AK-UV 75GPD 7-Stage Under-Sink Reverse Osmosis RO Drinking Water Filtration System with Alkaline Remineralization Filter and UV Sterilizer (AK+UV)
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Express Water’s Alkaline Water Filter features Active Mineral Technology that adds calcium, potassium, magnesium, and other minerals to your water.
This system purifies water in 10 stages.
Stage 1: sediment filter targets dirt, dust, sand, and rust.
Stage 2 and 3 carbon block and granular carbon filters remove chlorine, volatile organic chemicals, and odor-causing compounds.
Stage 4: Ro membrane that focuses on heavy contaminants such as lead, arsenic, chromium, fluoride, TDS, radium, and more.
Stage 5-9: alkaline-this are 5 stages of mineralization, antioxidants, and oxygen to your water.
Stage 10: Post Activated Carbon Filter The final pass on your water, right before it comes through the faucet. This stage helps remove any possible taste or odor.
More Express Water Reverse Osmosis Alkaline Water Filtration System
Express Water Elite RO Reverse Osmosis Alkaline Water Filtration System – 9 Stage RO Water Filter– Under Sink Water Filter with Alkaline Filter for Essential Minerals 100 GPD
Express Water Reverse Osmosis Alkaline Water Filtration System (clear housing+modern faucet+pressure gauge)– 10 Stage RO Water Filter with Faucet and Tank Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 100 GPD
Express Water Reverse Osmosis Alkaline Water Filtration System (clear housing + deluxe faucet + pressure gauge)– 10 Stage RO Water Filter with Faucet and Tank Under Sink Water Filter – with Alkaline Filter for added Essential Minerals – 100 GPD, ROALK10DCG, Clear.
Express Water Reverse Osmosis Alkaline Water Filtration System (clear housing + deluxe faucet + no pressure gauge)– 10 Stage RO Water Filter with Faucet and Tank Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 100 GPD
Express Water Reverse Osmosis Alkaline Water Filtration System (white housing + deluxe faucet + no pressure gauge) – 10 Stage RO Water Filter with Faucet and Tank Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 100 GPD ROALK10D
Express Water Reverse Osmosis Alkaline Water Filtration System (white housing + deluxe faucet + pressure gauge) – 10 Stage RO Water Filter with Faucet and Tank Under Sink Water Filter with Alkaline Filter for Added Essential Minerals. – 100 GPD
Express Water Reverse Osmosis Alkaline Water Filtration System (white housing + modern faucet + pressure gauge) – 10 Stage RO Water Filter with Faucet and Tank Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 100 GPD
Express Water 10 Stage Home Drinking Water Filtration System-Alkaline Mineral pH+ Reverse Osmosis 100 GPD RO Membrane Clear Housing Deluxe Chrome Faucet Residential Under Sink Purification ROALK10DC
Express Water Alkaline Reverse Osmosis Filtration System (with clear housing and single handle modern faucet) – 10 Stage RO Mineralizing Water Filter – Mineral, Antioxidant, pH + – Under Sink Purifier with Remineralization – 50 GPD Capacity
Express 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 (white housing and deluxe faucet)
Express Water UV Reverse Osmosis Water Filtration System – 11 Stage UV Water Filter with Faucet and Tank – Under Sink Water Filter – with Alkaline Filter for Added Essential Minerals – 100 GDP-
Express Water 11 Stage UV Ultraviolet + Alkaline + Reverse Osmosis Home Drinking Water Filtration System 100 GPD RO Membrane Filter – Deluxe Faucet – Clear Housing-
Express Water Alkaline Ultraviolet Reverse Osmosis Filtration System – 11 Stage RO UV Mineralizing Alkaline Purifier with Faucet and Tank – Mineral, pH + – 100 GDP with Pressure Gauge & Clear Housing-
Express Water Alkaline Ultraviolet Reverse Osmosis Filtration System – 11 Stage RO UV Mineralizing Alkaline Purifier with Faucet and Tank – Mineral, Antioxidant, pH + – 100 GDP with Pressure Gauge
Express Water 8 Stage Alkaline Antioxidant Reverse Osmosis Home Drinking Water Filtration System- 100GPD MODERN – ROALK10M
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APEC Top Tier ULTIMATE RO-PH90 purifies water in 6-stage that include:
1st stage: high-grade 5 microns, 10-inch high-capacity polypropylene sediment filter; removes dust, particles, and rust. It protects and extends the life of the membrane and system.
2nd stage & 3rd stage: premium extruded carbon block filter – gets rid of unpleasant chlorine, tastes, odors, cloudiness, and colors. Also removes VOC and other common chemicals from the water.
4th stage: the industry’s highest quality filmtec (dow chemical) high rejection TFC reverse osmosis membrane. It removes TDS (total dissolved solids) and contaminants like arsenic, lead, fluoride, chromium, radium, and much more.
5th stage: advanced coconut shell refining carbon 10-inch filter-TCR (Total Contamination Removal) removes any possible residual taste from the tank.
Stage 6 PH enhanced adds US-Made high-purity calcium carbonate to effectively raise pH in the water for those who desire alkaline water
RO-PH90 is tested and certified by WQA to remove 1000+ contaminants.
Available at
SimPure is a 6-stage Alkaline Reverse Osmosis Water Filtration System.
This system’s 6-stage is an alkaline water filter with Active Mineral Technology that adds Calcium, Potassium, Magnesium, and other minerals to your water.
It helps remove over 1000+ contaminants like chlorine, fluoride, lead, arsenic, asbestos, calcium, and more.
The SimPure Alkaline 6-Stage water filtration system features an automatic rinse that lengthens the filter’s life.
When it comes to supporting, the system is backed by a 1-year satisfaction guarantee with lifetime support by certified WQA.
It has a 2-year extended manufacturer warranty with registration.
SimPure Alkaline Filter Replacement Kit for 5/6-Stage Reverse Osmosis Systems, 6-Month Supply, for Alkaline Mineral Reverse Osmosis RO Systems.
includes a 5-micron PP sediment water filter, a 5-micron Activated Carbon Filter, a 5-micron carbon block, an inline carbon filter, and an alkaline replacement water filter.
Replacement filter
SimPure 5-Stage Replacement Filter Cartridge Pack Set for Standard Under Sink Alkaline Mineral Reverse Osmosis RO Systems
Includes Sediment + GAC + CTO + T33 + ALK that fits SimPure T2P.
Available at
Rinkmo Alkaline Reverse Osmosis Water Filtration System is a 6-stage water purification process.
The first three stages are PP, UDF, and KDF cartridges that help remove large and small particles of sediment, chlorine, and odor.
The fourth stage is a reverse osmosis membrane that removes 0.0001-micron pollutants.
The last two stages are an Alkaline Remineralization filter, which restores healthy minerals and produces a balanced alkalinity
The package includes a lead-free chrome faucet made of 304 stainless steel and a leak-proof design. Lead-free chrome plating increases corrosion resistance and safety.
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Reverse osmosis revolution Alkaline Countertop Reverse Osmosis is a 5-stage water purification process. The 5-stage include
1st stage: Premium Quick-Connect 5 micron sediment filter It helps extend the life of the system and the membrane. It removes dust and rust particles that are trapped.
2nd stage: Premium Quick-Connect T28 coconut activated carbon filter removes VOCs (volatile organic compounds), chlorine, cloudiness, offensive odors, colors, and unpleasant tastes.
3rd stage: Premium High Rejection TFC type reverse osmosis membrane removes total dissolved solids (TDS) arsenic, fluoride, lead, chromium, radium, viruses, bacteria, and other unhealthy contaminants are removed from the water. It provides 75/100 gallons per day capacity.
4th stage: Premium Coconut Carbon T33 type filter cartridge.
5th stage: alkaline filter. The filter contains 3 different media balls (alkaline, ORP, and tourmaline media). Alkaline increases the pH level of water from 5-7 Ph to 8.5-9.5. Tourmaline, also known as “Magic Stone” or “gemstone,” is a semi-precious mineral stone well known for its incredible ability to aid in the detoxification process of the human body. ORP balls reduce water oxidant reduction potential to -150 mV-350 mV, which can help to maintain the vibrant health of human cells and support metabolism.
It is recommended to change the filter every 12 months.
Available at
The Frizzlife PD600 is a tankless design that comes with filters inside and a lead-free drinking faucet. It is a compact and sleek filter system with a small and convenient footprint that takes up less space and saves storage space under the kitchen sink.
This system comes with three huge filters that purify water in four stages:
Stage 1: It is a 2-in-1 composite filter (PP sediment filter carbon block filter) that Blocks fine debris and reduces particles such as sand, silt, rust, and insoluble impurities. It also helps prolong the service life of the RO membrane.
Stage 2: High grade 0.0001 micron RO membrane (ASR212) – it helps get rid of contaminants such as chlorine, lead, heavy metals, fluoride, mercury, VOCs, chloramine, arsenic, and much more.
Stage 3: Alkaline remineralization filter (TAM3) – Restores natural minerals, balances the alkalinity of RO water, and adjusts the PH to more than 7.5. It also reduces bad taste, odor, and polishes the flavor.
This system provides 600 gallons of water per day with a high capacity and stable water flow. The system can fill a 330 ml cup of water in about 10 seconds.
The system features a smart display panel and a built-in TDS system. The smart display panel tells real-time out TDS and the remaining lifespan of each filter while the TDS system monitors the quality of your drinking water.
It also features color-coded indicators that will always remind you to change filters in advance.
Replacement of the filter is easy. The first two stages of the filter require shutting off the power supply and can be replaced only with one single turn. You don’t even have to turn off the power supply to change the TAM3 filter.
FRIZZLIFE Replacement filter
FRIZZLIFE ASR211 Replacement Filter Cartridge for PD600 (1st Stage)
FRIZZLIFE ASR212 RO Replacement Filter Cartridge for PD600 (2nd Stage)
FRIZZLIFE TAM3 Replacement Filter Cartridge (3rd Stage)
Available at
This system is certified and tested annually by NSF/ANSI 58, UPC (Uniform Plumbing Code Certification), and IAPMO (International Association of Plumbing and Mechanical Officials).
It comes with a built-in booster pressure that raises the low incoming water pressure above 45 psi. Increasing the water pressure helps improve the system’s efficiency and production speed.
Ukoke RO75GP is a 6-stage water purification process. The six stages include
Stage 1: PP Sediment filter.
Stage 2: Carbon KDF (GAC) filter.
Stage 3: Carbon block (CTO) filter.
The above 3 pre-filters help remove large contaminants and protect the RO membrane from chemicals like chlorine and chloramines.
Stage 4: RO membrane- This is the heart of the system that removes contaminants down to 0. 0001 microns
Stage 5: Fine GAC filter provides final polishing before the purified water is delivered to the faucet.
Stage 6: Alkaline Demineralization filter restores healthy minerals and a natural alkaline balance, while also producing a more natural taste.
The package includes a machine head with RO housing, pump and power adapter, pre-filter housings (2 opaque and 1 transparent) and housing wrenches, Complete 6-piece filter pack, 3.2-gallon pressurized tank (2.5-gallon holding capacity), Lead-Free brushed chrome-finish faucet, 4-color tubing (1/4″ OD), O-rings, Feed water adapter (fits both 1/2″ NPT; 3/8″ COMP) and drain saddle.
Available at
AlcaPure Reverse Osmosis Countertop removes contaminants in water and adds minerals that increase water PH at a level 0f 7-8.
The system treats water in 4-stages that include:
- Stage 1: Five Micron Sediment Filter that removes particles such as sand, sediment, and rust.
- Stage 2: Coconut-Based Activated Carbon Block Filter that removes VOCs, odor, chemical residues, and carcinogens such as THMs and pesticides.
- Stage 3: Reverse Osmosis Membrane. Provide 75 gallons of water per day.
- Stage 4 – Exclusive AlcaPure or OnliPure Post Filter-add beneficial minerals such as calcium and magnesium for alkaline PH.
The system will blink red to notify it is time to change the filter
It is available in black and silver-white
Alcapure Replacement Filters Bundle and membrane
Zero Installation Purifier Countertop Water Filter Replacement Filters Bundle
The set includes three filters. These include
- Stage 1-5-micron The prefilter removes sediment, rust, and other large particles.
- Stage 2-Carbon Block Filter removes chlorine and other disinfecting by-products.
- Stage 4: ALKALINE POST FILTER-Polishing AlcaPure Alkaline Post Filter adds beneficial minerals such as calcium and magnesium to purified water for the best taste. It also increases the alkalinity of the water to a healthy level of 7-8 pH.
Zero Installation Purifier Reverse Osmosis Membrane
This is the third stage of the purifier. It produces 75GDP and requires replacement every 2–4 years.
NU Aqua Platinum Series 100GPD Under Sink Reverse Osmosis Drinking Water Filtration System – Premium Water Filter (6 Stage Alkaline)
NU Aqua Platinum Series 100GPD is a 6-stage alkaline reverse osmosis system.
6-stages include
- Stage 1-Sediment Filter: This stage utilizes a 5-micron, 10” tall, high-capacity spun polypropylene sediment filter. This will remove large particles such as dirt, silt, rust, and sand.
- Stage 2-Pre Carbon Filter: This 10” tall granular activated carbon filter removes the more fine deep-seated particles such as sludge, rust, color, odor, and other organic pollutants.
- Stage 3-Carbon Filter: At this stage, a coconut carbon block filter will remove any remaining chlorine, chloramines, volatile organic compounds, heavy metals, and any bad taste or odor.
- Stage 4-RO Membrane: The TFC Reverse Osmosis Membrane is a thin, semipermeable membrane that water is forced through to remove remaining dissolved solids such as salt.
- Stage 5-Carbon Polishing Filter: The inline T33 granular activated coconut shell carbon filter polishes your water and removes any bad taste or odor before it’s sent out to the faucet.
- Stage 6-Utilizes bioceramic media, tourmaline, calcite, and maifan It features ORP balls specially formulated with natural minerals to revitalize and enhance your water’s PH and create antioxidants.
It comes with a clear sediment filter housing.
More Nu Aqua
NU Aqua Platinum Series 6 Stage Alkaline 100GPD RO System with Booster Pump
NU Aqua Platinum Series 7 Stage Alkaline and UV Ultraviolet 100GPD RO System
Replacement filter
- NU Aqua Platinum Series 6-Stage Complete Alkaline Filter Replacement Set
- NU Aqua Series 6-Stage 1-Year Alkaline Replacement Filter Set
After purchasing your RO system, make sure you find a TDS meter or water test strip to see whether the system is working well.
To select the replacement filter for your system, see our posts about the reverse osmosis replacement filter.
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