Review: iSpring RCC7 & RCC7AK RO Drinking Water Filter Systems 2022

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In this article, we are going to review 2 of iSpring’s highly popular and affordable RO water filter systems, namely the RCC7 and the RCC7AK.

The only difference between the two is that the latter comes with an additional remineralization stage to increase water alkalinity.

Apart from that, both units feature the same NSF-certified 5-stage filtration process designed to progressively remove impurities from your water to make it ready for drinking.

iSpring RCC7

iSpring RCC7

Filter Stages:5
Daily Water Limit:75 gpd
NSF Standard:58
Warranty:1 Year

Our Rating

iSpring RCC7AK

iSpring RCC7AK

Filter Stages:6
Daily Water Limit:75 gpd
NSF Standard:58
Warranty:1 Year

Our Rating

iSpring RCC7 & RCC7AK Reverse Osmosis Systems – Key Features

  • Stage 1: A polypropylene (PP) pre-filter removes sediment, dust, rust and other larger particles. The cool thing here is that the filter comes in a transparent housing, so you can watch it doing its work and always know when it’s time for a replacement.
  • Stage 2: A 5-micron granular activated carbon (GAC) pre-filter removes chlorine, cloudiness as well as taste and odors. This allows the following carbon block filter (stage 3) and RO membrane (stage 4) to operate at maximum efficiency. Plus they’ll last longer, which saves you money in the long run.
  • Stage 3: A 5-micron carbon block pre-filter helps to get rid of chloramines used for disinfection, VOCs and other potentially harmful chemicals.
  • Stage 4: A wet RO membrane rated at 0.0001 micron allows nothing, well almost nothing, but pure H2O to pass through. Say goodbye to 96% of lead, 94% of fluoride and 98-99% of waterborne pathogens, and say hello to healthy drinking water!
  • Stage 5: Another GAC post-filter removes possible residual tastes and odors that originate from the water storage tank.
  • Stage 6 (RCC7AK only): A pH filter adds healthy minerals like calcium, magnesium and potassium that were lost during filtration back into the water. This alkalinization balances low pH levels and improves water taste, too.

The recommended pressure at which these system can operate is 45-70 psi. If the water pressure in your home is too low, filtration might be inefficient and slow.

RCC7 & RCC7AK Pros

As already mentioned above, the iSpring RCC7 and RCC7AK are tested and certified against NSF Standard 58. They remove a bunch of heavy metals, hormones, viruses, bacteria – you name it – and provide water that’s clean, safe and tastes great.

Water capacity is up to 75 gallons per day – enough to provide even larger families with plenty of water at all times.

Above that, the filtration runs very quietly. You will most probably never hear any noise from it.

More advantages:

  • Ease of mind – A leak detector triggers an alarm sound whenever it detects moisture underneath the unit.
  • No duds – All iSpring products are thoroughly tested before shipment. That’s why you might notice small traces of water upon delivery.
  • 1-year money-back guarantee – If you are not satisfied with your purchase, get a full refund in the first year.

iSpring RCC7

The iSpring RCC7 – learn more on

iSpring RCC7AK

The iSpring RCC7AK – learn more on

System Installation

It may look complex at first, but we consider the install of the iSpring RCC7 or RCC7AK to be fairly simple and straightforward. All parts are included and you are guided by clearly written instructions and helpful videos. On top of that, iSpring’s professional technical support based in Alpharetta, Georgia is just one phone call away.

Sure, some tools are required like a pipe wrench and drill, but apart from that all you need is a little patience and about 90 minutes spare time. If you are handy around the house, you might be even faster than that.

By the way, if you decide to go DIY, make sure to push the tubing ½ inch deep into the quick connect fittings to avoid leaks.

This is iSpring’s installation video for the RCC7 model:

Parts List

  • RO module with filter and membrane housings
  • 4x filters
  • pH alkaline filter (RCC7AK only)
  • RO membrane
  • Feed water adapter (⅜” and ½”)
  • Drain saddle
  • Water storage tank (2.5 gallons capacity, white)
  • Tank stand
  • Tank valve
  • Water detector
  • Automatic shut-off valve
  • Brushed nickel faucet (lead-free)
  • Color-coded tubing
  • Filter housing wrenches
  • Teflon tape
  • Spare O-rings and fittings

Filter/Membrane Replacements

Both systems are low in maintenance and replacement filters are standard-sized. In order to change the filters or membrane, you have to shut off the cold water supply and depressurize the whole system.

For the filters, twist off the housings using the wrench, remove the old cartridges and replace them with new ones. Then tighten the housings back on.

For the membrane, first remove the tubing from the quick connect fitting on the membrane housing cap. Twist off the housing cap and pull out the old membrane. Next, clean the membrane housing using a mix of hot water and soap. Rinse thoroughly afterwards. Lastly, insert the new membrane into the housing without making direct skin contact. Make sure the O-ring is properly seated and put the membrane housing cap back on and tighten it.

According to iSpring, this is how often you will have to change each filtration component:

  • Polypropylene pre-filter: About every 6-12 months
  • GAC pre-filter: About every 6-12 months
  • Carbon block pre-filter: About every 6-12 months
  • RO membrane: Every 2 to 3 years
  • GAC post-filter: About every 12 months
  • pH alkaline post-filter: About every 6-12 months

Please note: Replacement frequency depends on your water usage and source water quality. What’s more, whenever you notice a decrease in water flow or treated water quality, it’s important to replace the filters in a timely manner.

Replacement costs? Low for both the RCC7 and the RCC7AK.


Here is a link to the manual of the iSpring RCC7.

And here is a link to the manual of the iSpring RCC7AK.

RCC7 & RCC7AK Cons

Here is what we don’t like:

  • A handful of customers complained about recurring leaks, although some of them paid a certified plumber to do the install.
  • Other customers said that they received faulty parts which needed to be replaced.

iSpring RCC7 & RCC7AK Review: Our Verdict + Best for

After installing the iSpring RCC7 or RCC7AK and using it for a couple of months, it seems like most customers couldn’t be happier with their purchase. Both RO systems completely eliminate the need to buy bottled water ever again, which means that they pay for themselves in about a year. They are best for safe and great tasting drinking water and are sized just fine for most households.

Our verdict: 4.5 out of 5 stars!

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If you have any questions about the iSpring RCC7/RCC7AK or any other filter system really, please don’t hesitate to leave a comment below!

About the Author Alexandra Uta

Alex is a content writer with an affinity for research and a methodical attention to detail. Her writing interests have included many different topics, water treatment among them, which have encompassed varying writing styles.
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Leave a Comment:

Judy Baucom says December 21, 2018

Are these filters easy to do yourself, (if know nothing about it or plumbing) or do you have to hire a plumber to install?

    Gene says December 22, 2018

    The most difficult part about the install is that you have to drill a hole in your countertop for the RO faucet. And you have to make a connection to the sink drain line. All in all, not very challenging if you are handy with tools.

Greg wellen says August 17, 2020

My replacement filters lacked the necessary elbows as inserts to the filters. Tried to call for the replacement parts and only got a voice message. Further, the one filter did not even have the necessary internal connectors that the exact same filter on another had. I ordered several at the same time. I can not believe the lack of quality control iSprings has put in place. Totally unacceptable.

    Gene says September 4, 2020

    Doesn’t sound acceptable for sure.

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