iSpring 6-Stage RCC7AK RO Water Filter System review

Introduction

As America's favorite brand of reverse osmosis systems, and backed by iSpring’s industry-leading customer support, the iSpring 6-Stage RCC7AK RO Water Filter System is unequaled in quality, performance, and durability. The system consists of 6-stage, layered filtration built around precision reverse osmosis (RO) technology that removes over 1000 different kinds of contaminants in order to provide the best home drinking water filtration available. Unlike some other systems, the combination of both GAC and CTO filters in the 2nd and 3rd stages provides extra layers of protection against harmful chemicals than CTO alone. It features a 75 gallon-per-day capacity RO membrane, which is larger than most in its class and provides the capacity to economically handle the drinking water needs of even a large family.

Details

The iSpring 6-Stage RCC7AK RO Water Filter System is a popular and highly-rated variation of the iSpring RCC7 (our #1 pick for a value system).

For just a few more dollars, you get the same great system as the RCC7 with the addition of a remineralization filter.  Water that has been purified by reverse osmosis can have a bland taste because it is slightly acidic and all of the dissolved minerals that provide flavor have been removed.  The RCC7AK adds safe minerals back into the water and raises the pH to be more alkaline.  The result is a fresher tasting mineral water that many people prefer.

It is one of the higher capacity systems that we have reviewed since it produces 75 gallons of purified water per day through 6 stages of filtration.

iSpring RCC7AK 6-Stage Superb Taste High Capacity Under Sink Reverse Osmosis Drinking Water Filter System with Alkaline...
  • High Capacity Reverse Osmosis water filtration for safer, healthier water. This under sink mounted water filter and water softener...
  • Experience clean, safe, good-tasting water every time you turn on the faucet. Enjoy crystal clear ice cubes, fresher tea and...
  • The RO membrane removes not only harmful pollutants but also a few helpful minerals. As a result, a standard 5 stage RO system...
  • Premium quality components ensure highest reliability and low maintenance for many years to come. Clear see-through 1st stage...
  • Easy, do-it-yourself installation, typically in a couple of hours with industry-leading help just a phone call away. Fits under a...

Last update on 2019-10-10 / Links, Images from Amazon Product Advertising API

The iSpring RCC7AK wastes 3 gallons to produce a gallon of purified water, although this amount will vary depending on your feed water pressure. This is average compared to the other systems we recommend.

The system comes with everything that you need and is designed to be installed in about 1 hour by someone with basic DIY skills.  Both a faucet and pressurized storage tank are included.

After flowing through the initial 5 stages of the iSpring RCC7 line of Reverse Osmosis filtering products, the RCC7AK model adds another Alkaline Remineralization (AK) stage. This stage is designed to restore the natural alkalinity and mineral balance of the water. The RO process effectively generates pure water but it also removes a few helpful minerals in the process. The red mineral stone portion of the AK filter adds back healthy minerals including not just calcium, but also other beneficial minerals, like magnesium, that other systems don't. The calcite portion of the filter neutralizes the pH of the RO water. And the water tastes better too. Because RO water is so pure, some people may find it tastes unnatural. Many people prefer the more natural taste that comes from the presence of some minerals in the water. Remineralization restores just the right proportion of healthy minerals.

Designed for do-it-yourself installation by most users, the entire system fits nicely under a standard kitchen sink. Installation is straightforward and all parts necessary for installation are included. You are guided by clear, well organized written instructions, instructional videos and access to iSpring’s unparalleled technical support. The system is quiet and low maintenance with no moving parts. Replacement filters are standard sized and sold at factory direct pricing. A lead-free, solid brass faucet with brushed nickel finish is included with the system and is usually mounted on the counter as the primary source of drinking water, but output lines can also be connected to your ice maker, coffee maker, etc. The whole system is backed by a 1-year money-back guarantee, a 3-year manufacturer warranty and iSpring's unique lifetime technical support provided right here in the USA in Alpharetta Georgia. With the iSpring RCC7AK, enjoy crisp-tasting, bottled quality water, every day, right in your home.

  • Incoming Water Pressure: 45 PSI – 70 PSI
  • Operating water temperature range: 40 – 100 °F
  • Maximum TDS: 750 ppm

Install this RO system in a location where it is safe from hot/cold weather and direct sunlight. Avoid hitting, dropping, or dragging the system as this can cause cracks and leaks

Water
Efficiency

The water efficiency of a RO system is measured in how much water is wasted to produce 1 gallon of purified drinking water. In some systems, as much as 4 gallons of water is wasted to produce 1 gallon of purified water. With the iSpring RCC7AK, the wasted water is only 3 gallons for every gallon of clean water produced. The amount of waste water will vary depending on the pressure and temperature of the feed water but is about average across all of our suggested systems.

Ease of Installation

Before you start – this system is intended to work with a feed water pressure of between 40 and 80 psi. If the pressure is lower than 40 psi, a permeate pump is needed and if it’s above 80 psi, a pressure regulator should be used.

The whole RCC7AK system is designed to be installed by anyone with basic DIY skills in about an hour. If you do not feel confident in installing the system yourself a plumber can do it for you.

The only potentially difficult part of the whole installation is drilling a hole in the sink top for the pure water faucet. This may not be necessary if a hole already exists for a hand sprayer, soap dispenser, or is available with a blank cover.

The installation and owner’s manual has recently been improved, but before starting it is worth taking a look at this installation video from iSpring. It takes you through all the stages step-by-step. Included in the video are demonstrations on how to change the filter cartridges and a few handy tips.

If you are familiar with push fit connectors, you should be aware that iSpring has chosen to supply locking connectors. These devices use a clip that needs to be removed before pushing the plastic pipes in place.

Pros

  • Remineralization filter raises pH and improves taste
  • 75 gallons of pure water output per day
  • Water leakage alarm included in the kit
  • Inexpensive replacement filters
  • Removes up to 98% of chemicals, heavy metals, sediment, and other contaminants
  • 4-gallon pre-pressurized water storage tank
  • European-designed brushed nickel all-metal faucet
  • 3 year manufacturer’s limited warranty and 1-year money-back guarantee
  • Lifetime US based customer support
  • Made in the USA

Cons

  • 3 gallons of wasted water per 1 gallon of purified water is only average
  • The filter life is shorter than some competitor systems
  • Does not include a UV light to kill bacteria and other microorganisms
    • Well and natural water sources are more prone to this problem but only a water test can confirm the level in your water

iSpring RCC7AK 6-Stage Superb Taste High Capacity Under Sink Reverse Osmosis Drinking Water Filter System with Alkaline...
  • High Capacity Reverse Osmosis water filtration for safer, healthier water. This under sink mounted water filter and water softener...
  • Experience clean, safe, good-tasting water every time you turn on the faucet. Enjoy crystal clear ice cubes, fresher tea and...
  • The RO membrane removes not only harmful pollutants but also a few helpful minerals. As a result, a standard 5 stage RO system...
  • Premium quality components ensure highest reliability and low maintenance for many years to come. Clear see-through 1st stage...
  • Easy, do-it-yourself installation, typically in a couple of hours with industry-leading help just a phone call away. Fits under a...

Last update on 2019-10-10 / Links, Images from Amazon Product Advertising API

User Reviews

Review 1

BEWARE! Prop65 Warning! After researching water filters and deciding on this system, I was satisfied with my choice. It does have great reviews. We installed the system and had an issue with the water not flowing through the RO membrane, so I referred back to the listing on amazon. I noticed that the companyhad added the Prop65 warning: may contain chemicals known to cause cancer or birth defects! I called the company and they told me it was nothing to worry about but would not disclose what the system contains that would require that warning. I don’t know about others, but this certainly doesn’t give me peace of mind. I’m purchasing a filter for the health of my family and do not want any added chemicals, what’s the point? I packaged the system up and returned it immediately! This just shows me that the company is cutting corners using cheap materials that are hazardous to health. A water filtration system is supposed to purify not contribute to the problem. Frustrating!!

Review 2

I needed a new RO system. My old system was over 7 years old, it was time for something better. I found the ispring had a 6stage RO system. I also looked at the cost & availability of replacement filters. I like the fact there are filter kits to buy, and are reasonably priced. I have my RO system in my basement, below my kitchen. The RO system is well packed & labled. The instructions are easy to understand. The filters are packed in their containers–well marked. The installation was painless. After all I was replacing an existing unit. The storage tank has a valve. My old unit did not have a valve. Last step was too turn on water & check for leaks. Extra attention was needed to install hoses into fittings. The hoses seat themselves around 1/2″ inch. The manual suggests to place a mark on the hose ends to ensure they are seated correctly. No leaks, I let the system fill up after 3 hours. Then drain completely. The water from the new system has a nice taste. Overall, the system was well laced,easy to install & works great. I would buy this system again.

Review 3

This system was recommended to me by a friend and after installing it and having it running for about three months I couldn't be happier with it. The water is hands down the best I've ever tasted from any source and it's completely eliminated the need to buy bottled water for my wife and I so it will pay for itself in about a year. I also bought a TDS meter to measure the total dissolved solids in our water (HM Digital TDS-4). Our tap water consistently measures 690-720 ppm which is extremely high and consequently, it tastes pretty terrible. Our previous faucet mounted Pur filter only made a marginal improvement. The water coming out of the RO system now measures at around 25 ppm and tastes amazing.

From reading most of the reviews here and from my personal experience of installing it, I put together some information that I've given to friends and thought it would be helpful to have it consolidated into one post here. A few reviews mentioned that the main shut-off valve that comes with the RO system started leaking after a while and that you'll be much better off if you just replace it with a better one from the start. The valve is $11 and you can get it at Home Depot and I opted to replace it from the start.
It's a Watts 1/4 in. Plastic Adapter Stop Valve model #:P-467CS and Home Depot SKU: 1000018247

Just a few notes regarding the installation:

Very important: Cut all hoses so the ends are square and and the cuts are clean before making the connections or they may leak. I did that and I've had no leaks, but I can see how you might have leaks if you decide to skip this very important step which is also mentioned in the installation instructions.

A few reviews mentioned that changing the order of the filters so the mineral stage comes before storage tank improves the taste of the water. I opted to do this and have never looked back as the water tastes amazingly good.
The way it's configured out of the box (after the 3 big filters) is RO Membrane->Storage Tank->Carbon->Mineral->Faucet
Change it to RO Membrane->Mineral->Storage Tank->Carbon->Faucet.

When you're ready to run water through it for the first time (and whenever you change filters), disconnect the input hose to the RO membrane and flush the first three stages into a bucket. Just like a faucet-mounted filter (ie: Pur, Brita), the water will come out gray at first from the residual carbon so it's probably better not to send all that into the RO membrane. Once the water runs clear connect it to the RO membrane.

I think the rest of this is in the instruction manual, but I'll mention it anyway:

After you re-connect the RO membrane, keep the valve to the storage tank off and let the water run for a while. It will only trickle out and like the carbon filters, the RO membrane needs to be flushed for a little while and you don't want that going into the storage tank.

When you're ready to fill the storage tank, it takes about two hours to fill. Once the tank is full, open the faucet and let it drain it completely and re-fill. You'll want to do that twice before using it. The water will have some bubbles in it at the beginning and it will gradually become very clear.

I think that covers it! All of that made a for a leak-free installation and some very tasty water!

Since we don't need to buy bottled water anymore, we bought a few of these reusable bottles on Amazon:
Copco 2510-2183 Chevron Hydra Bottle, 16.9-Ounce, Neon Orange Dots

Review 4

Nick thanks for a great product. This is my 5th system that I have installed in my house over the years,and this is the first time ever that I was not frustrated with leaks and connections that just did not fit properly. Because of where I have this installed it is rather difficult to get to, and therefore having no leaks at all when I turned it on was very much appreciated. As you can see from my photos this was a difficult location between two cabinets, no leaks hurray!
The purified water has the best taste of any reverse osmosis system that I have tried. Great product, and I highly recommend this system for trouble free great water.

Conclusion

The iSpring RCC7AK is a very economical and easy to install system that is highly praised in online reviews.

For just a few dollars more than the VERY popular RCC7,  you get a remineralization stage that many people prefer.

One area of concern was that the filters advertise a relatively short life when compared to competing systems. This shorter life is balanced out by the lower cost of the iSpring cartridges versus the competition.

Many users have commented that they prefer to use a TDS meter to check the efficiency of the filters before changing them rather than just relying on a usage time. For those reviews, the system that was tested was of the latest standard, but in reading some literature from iSpring, it was good to note that they do pay attention to the (very) few negative reviews and have responded by upgrading components that may have caused problems in the past.

For the features, price, reputation, and quality, the iSpring RCC7AK is a highly recommended reverse osmosis system.

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