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iSpring RCC7AK 6-Stage Reverse Osmosis System

The iSpring RCC7AK is an upgraded version of the RCC7 model with the addition of a nice extra filter. It can filter out all types of contaminants and enrich the water in the same process giving you a healthier, natural-tasting, clean drinking water.

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Excellent Filtration Process

The iSpring RCC7AK Reverse osmosis system features a multi-layered filtration process designed around 6 very efficient filtration stages specially tailored to progressively remove all types of contaminants and improve the water quality.

The first three stages are pre-filters consisting of polypropylene sediment filter in the 1st stage, GAC filter in the 2nd stage and a carbon block filter in the 3rd stage.

These three filters trap all the sediments and particles that are larger than 5 microns and more importantly removes chlorine, chloramines and other chemicals present in the water.

The fourth stage where the magic happens sits a quality RO membrane which eliminates all the remaining contaminants down to 0.0001 microns leaving behind only pure water.

A fine GAC filter takes the fifth stage and where the water from the RO tank is further polished to remove any residual contaminants from the tank.

Restoration of Lost Minerals

After going through the initial 5-stage RO filtration process, the RCC7AK includes a 6th stage which consists of an alkaline remineralization filter.

The standard 5 stages produce clean, pure water with all the contaminants removed as well as the few helpful minerals present in the water.

This 6th stage is a big plus as the alkaline filter restores the healthy minerals lost due to the RO process. The AK filter features red mineral stones which add back calcium and other essential minerals such as magnesium and potassium.

The filter also has a calcite portion that helps raise the pH levels of the RO water hence creating a much natural alkaline balance in the water.

Therefore, you not only get the benefit of drinking clean, purified water but you are also assured of getting some healthy minerals as well and a better, more natural taste.

RO water is so pure and as such it often tastes unnatural, but with this alkaline filter in place, your water will certainly taste much better.

Furthermore, the filter is made up of only natural mineral stones that serve as the filtration media hence your body will have no problem absorbing the restored minerals directly.

Filtration Capacity

The filtration capacity of RO membrane of this iSpring RCC7AK model is also quite decent for an under-sink residential RO system.

It’s capable of producing up to 75 gallons of filtered water a day which is sufficient to handle the water needs of small to medium-sized families whether it’s drinking or cooking.

Moreover, the system is relatively efficient as for each gallon of pure water produced, it wastes only 2 gallons which is really a mean feat for most filtration systems.


  • Efficient filtration process ensures crisp, clean, drinking water
  • Restores healthy minerals to the water and improves its pH balance
  • Decent filtration capacity and pure to wastewater ratio
  • Durable stainless steel construction 
  • Easy installation with a convenient noise-free operation
  • Backed by one year warranty plus a one-year money-back guarantee


  • That automatic shut off valve seems a bit flimsy
  • May need some DIY skills for easy installation

Installation and Maintenance

Featuring quick fittings, a cabinet fitted bracket and a clear, well-organized manual and videos, installing the RCC7AK is quite easy, especially if you have some little DIY skills.

All the parts you need including the pressurized tank, faucet, drain saddle, feed water adapter, tank valve and tubings are provided alongside the filters, membrane and the RO frame itself.

The system will easily fit under any standard kitchen sink and the overall construction is quite solid. The filters are durable too with the first three pre-filters requiring replacing just twice a year and the two post-filters requiring changing once a year.

The membrane will last 2 to 3 years based on the quality of your source water. Noise won’t also be a major problem like in other systems. The unit runs smoothly producing the least sound possible. 

All in all, the iSpring RCC7AK is a well-designed RO system with an effective 6-stage filtration process that eliminates all kinds of contaminants from the water and replenishes it with essential, natural minerals.

It’s definitely a win-win investment for anyone looking for an affordable system that can deliver a more natural tasting and healthier filtered water.

This video shows you step-to-step how to install iSpring 6-Stage RCC7AK Under Sink Reverse Osmosis Drinking Water Filter System.

Price & Rating

ProductiSpring RCC7AK 6-Stage Reverse Osmosis System
Rating4.6 out of 5 stars (More than 3710 reviews)
Recommended price214.99 USD (Check the latest price at Amazon.com)

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Product Specifications

Pre-filtersPP sediment filter
Carbon KDF (GAC) filter
Carbon block (CTO) filter
RO membrane0.0001 microns
Post-filtersFine GAC final polishing filter
Alkaline remineralization filter
Incoming Water Pressure45 PSI – 70 PSI
TDSAbout 20-70 PPM
Storage tank3.2-gallon capacity
2.5-gallon holding
Tubing4 color-coded tubing
FaucetLead-Free brushed nickel faucet
Fitting adaptors1/2″ NPT & 3/8″ COMP
Filtered Water to Waste Water Ratio1:3
FeaturesFirst stage clear housing
Spare fittings & O-rings
1-year manufacturer warranty
iSpring’s unique lifetime technical support
DocumentsUser Manual [PDF]
Warranty [PDF]

Replacement Filters

6-MonthiSpring F3 – Prefilter Replacement
1-YeariSpring F9K – Set for 6-Stage (RO membrane is not included)
2-YeariSpring F19K75 – Set for 6-Stage + 1 RO membrane
3-YeariSpring F28K75 – Set for 6-Stage + 1 RO membrane
RO Membrane (only)iSpring MC7
Post filter (only)iSpring FT15
Minerals filter (only)iSpring FA15


What is the size of the hole should I drill the counter/sink for the faucet?

The size should be 1/2″. Many users suggest using a 1/2″ diamond drill bit with a hollow in the middle to drill the hole. For example https://amzn.to/2BaC9Xq.

Are the components BPA free?

Many customers asked and the answer from the manufacturer is “Yes, they are all BPA free”.

My water is coming out cloudy, what should I do?

After you installed the RO system, make sure you have completely drained the tank several times, if it’s still cloudy, you should contact the company to check again.

Images Gallery

iSpring RCC7AK 6-Stage Reverse osmosis system

iSpring RCC7AK 6-Stage Reverse Osmosis System
iSpring RCC7AK's benefits
iSpring RCC7AK’s benefits
 iSpring RCC7AK  - Faucet
iSpring RCC7AK – Faucet
  iSpring RCC7AK  -  Components
iSpring RCC7AK – Components
  iSpring RCC7AK  -  Stages
iSpring RCC7AK – Stages
 iSpring RCC7AK  -   Filter life time
iSpring RCC7AK – Filter life time
 iSpring RCC7AK  -   RO membrane
iSpring RCC7AK – RO membrane
 iSpring RCC7AK  -   Usages
iSpring RCC7AK – Usages

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