3 Best 7-stage Water Filters by iSpring, APEC and Aquaphor in 2020

We often think that only bottled water is the purest for drinking purposes. On the contrary, a 7 stage water filtration system can deliver the same quality water without having any negative impacts on the environment.

The water filtered through a 7-stage filtration is economical, available at all times, and purest of all. In this article, we will discuss the best water filtration systems in the 7-stage category.

We have done considerable research on these filters so that you can get the best product from the market without any hassle.

Read more: Top 3 stage water filters

Best 7-stage Water Filtration Systems (Comparison)

 Best 7-stage Water Filtration Systems 
Editor's ChoiceiSpring RCC7AK-UV 75GPD
  • 3.2 gallons filtration capacity

  • 18 months filter life

  • 0.0001 microns filter

APEC Water Systems ROES-PHUV75
  • polypropylene sediment filter

  • Best for arsenic, fluoride, heavy metals and Bacteria

  • Food grade certified material

Aquaphor Water Filters RO-101
  • Filters 50 gallons/day

  • 18 months filter life

  • natural pearl Dolomite filter


1: iSpring RCC7AK-UV 75GPD 7-Stage Under-Sink Reverse Osmosis RO Drinking Water Filtration System with Alkaline Remineralization Filter and UV Sterilizer

  • Type: Undersink Reverse Osmosis
  • Capacity: 75 gallons per day
  • RO Membrane life: 2 – 3 years

More Features: This 7-stage water filter comes with alkaline remineralization filter and ultra violet sterilizer that removes sediments, chlorine, chloramines, heavy metals, and other such impurities.

iSpring water filter with remineralization and UV sterilizer

Filtration Capacity: The system has a filtration capacity of 75 gallons of water per day. The pressurized tank has a filtration capacity of 3.2 gallons and a holding capacity of 2.5 gallons. It offers more than enough water to handle the daily water requirements of a large family, a medium-sized restaurant and a small business facility.

Filtration Capabilities: The filtration system is composed of seven different stages and can filter sediments, volatile organic compounds, heavy metals, and all the other impurities from your water source. The first three stages are the pre-filtration stages (consisting of a sediment filter, granular activated carbon filter, and carbon block filter) and that remove sediments, chlorine, chloramines, heavy metals, and other such impurities.

All of these filters have a lifespan of 8-12 months. The fourth stage is the most important and consists of reverse osmosis RO membrane; it filters out any leftover impurities to provide you with 99 percent pure water. It can track down contaminants to 0.0001 microns; it is so small that only water molecules can pass through it.

An RO membrane needs to be changed after 2-3 years. The fifth stage polishes your water before delivering it to the faucet. It removes odor and any residual chlorine from the water. The sixth stage is the ultraviolet sterilization stage and is powered by an 11-watt sterilizer. It removes any extra small microorganisms like bacteria and viruses that may go past the RO membrane.

The sterilizer consists of a sensor that automatically turns it off to save power and increase the life of the ultraviolet lamp. It works for one year. The final stage is the alkaline re-mineralization (AK) stage; it is designed to restore the alkalinity and mineral balance of your water.

The RO membrane may also remove healthy minerals like magnesium and calcium from your water source. This stage adds them back to your drinking water to make it more healthy.RO filtered water is very pure, and you may find its taste a bit different, the AK stage adds the natural elements back to water and make its taste natural. You need to replace the alkaline filter every six months.

Installation: You can install the system under any standard size sink. All the equipment needed to install the system comes along it. The company offers a detailed step by step instruction guide, videos, and customer service to walk you through all the stages of installation.

Technical Details: The unit has a working temperature of 40-100 degrees Fahrenheit and a working pressure of 45 PSI to 70 PSI. It comes with a one year warranty and a lifetime support service for any issues. The pre-filter housings are opaque and transparent. All the connections are of 1-inch to give you better water pressure. Make sure you insert the tubing ½ inch for a leak prof installation.

Our Opinion and Verdict: When it comes to the 7-stage water filtration system, iSpring is the best. All the features of this unit are outstanding. If you are looking for quality drinking water with 99 percent purity, this system is the perfect choice for you.

2: APEC Water Systems ROES-PHUV75 Essence Series Top Tier Alkaline Mineral and Ultra-Violet UV Sterilizer 75 GPD 7-Stage Ultra Safe Reverse Osmosis Drinking Water Filter System

  • Type: RO water filter
  • Efficiency: 99%
  • Best for: chlorine, odors, cloudiness and organic impurities

More Features: This water filter removes the total dissolved solids (TDS) like arsenic, fluoride, heavy metals. The ultraviolet light removes bacteria and viruses.

APEC water filter with Top Tier Alkaline Mineral and Ultra-Violet UV Sterilizer


Filtration Capacity: The system has a filtration capacity to accommodate the drinking needs of a large family, a small restaurant, or a business facility. Once installed, you do not need to worry about the supply of drinking water at your place.

Filtration Capabilities: The working of 7 stages is combined to bring you 99 percent pure drinking water without any hassle. The first stage is the high-capacity polypropylene sediment filter, and it removes dust, sand, dirt, and other particles from your water. Apart from this function, the filter protects the other filters and helps in extending their life.

The second and third stage is carbon block filtration, and it gets rid of chlorine, odors, cloudiness, it also removes volatile organic compounds from your water and chemicals as well. The fourth stage is the high rejection TFC-reverse osmosis membrane, which eliminates 99 percent of purities from the water source.

It effectively removes the total dissolved solids (TDS) like arsenic, fluoride, heavy metals. Bacteria, viruses, fungi are also trapped here. The ultraviolet light on the fifth stage kills 99.9 percent of bacteria, viruses, and cysts in the water, ensuring that you get bottled water quality at your home.

The sixth stage is designed to go a step further to remove any leftover contaminants. It uses a coconut carbon filter for total contamination removal. The last and seventh stage is the alkaline stage. The PH of the water is adjusted here, and necessary minerals are added in the water.

Installation: All the equipment needed to install the system comes along the system. Once you have arranged everything and gone through the instruction manual, you will need a couple of hours to get it up and running.

Technical Details: All the materials are made from food-grade and certified materials. The faucet is 100 percent lead-free, and it can be easily attached to any standard sized sink setting.

Our Opinion and Verdict: An excellent option to get 99 percent pure water at your home.

3: Aquaphor Water Filters RO-101 Reverse Osmosis Water Filtration System 7 Stage Non-Electric Compact Under Sink Ro No Booster Pump Needed Patented Water Airless Tank Remineralization Cartridge

  • Type: Undersink, non-electric
  • Filtration capacity: 50 gallons/day
  • Tank capacity: 1.3 gallons

More Features: It comes in a compact size that can be installed under sink. It doesn’t require a booster pump to increase water pressure.

Aquaphor non-electric undersink water purifier


Filtration Capacity: This model has less filtration capacity than the one discussed above. It can filter around 50 gallons of water per day and has a tank volume of 1.3 gallons. It is only to be used in a medium to a large household.

Filtration Capabilities: The first four stages of filtration are purification stages. The first stage uses a sediment filter to remove dust, sand, dirt, and rust. It catches particles with a size of 5 microns or larger. The second and third stages use carbon block filters to remove chlorine, organic compounds, herbicides, insecticides, and industrial solvents from your water source. It can track down impurities larger than 3 microns.

The fourth stage is the RO membrane, which further captures any residual impurities in the water. It is so effective that it may also remove some of the necessary minerals in the water. To compensate for this, the fifth stage balances the minerals and PH of the water. It uses a natural pearl Dolomite filter to enrich the water with healthy minerals in your drinking water.

Installation: It is a complex system; if you are not fully aware of all the plumbing fixtures of your home, you may need the help of a professional plumber to install it.

Technical Details: All the parts are made from food-grade plastic and recyclable materials and are NSF 58 certified for solid construction and high-quality materials.

Our Opinion and Verdict: It is a very reasonable 7-stage purification system. The filters used in the system can last for around 18 months as compared to 10-12 months for other units.


When it comes to water purification in your homes, a 7-stage water filtration system is simply the most effective, functional, and economical filtration option. All the 3 plants on our list are excellent options. You can buy the one that meets your needs the most.

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