iSpring RCC 7 Reverse Osmosis 5-Stage 75GPD Review

The iSpring RCC 7 is a compact, under sink 5 stage reverse osmosis (RO) system that has the capacity to produce 75 gallons of pure water per day. The iSpring RCC 7 comes complete with all fitting, hoses, connections and a dispensing faucet to enable a DIY home installation.

The system works by passing water through a series of pre-filters, then through the RO filter, and finally through a carbon filter to remove any residual taste or odors. The pure water is then stored in a 3.2 gallon pressurized tank until you need it.

The system removes up to 98% of chemicals, heavy metals, sediment, and other contaminants.

The filter cartridges last for about 6 months depending on the quality of the feed water and the RO membrane should be changed every 2 to 3 years, again depending on the quality of the feed water.

All RO systems periodically flush the membrane to clean it. This uses water that is then flushed through the waste pipe. Unless this water is recycled, as much as 4 gallons of water is wasted for every gallon of pure water produced in other systems. The iSpring RCC 7 only uses 2 gallons to produce a gallon of pure water, although this amount will vary depending on your feed water pressure.

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Filtration System Design

The RCC 7 system has cartridge type filters that sit in a clear plastic filter holder. Although the filters are not as easy to change as modular filters such as those used on, for example, the Home Master TMAFC Artesian RO filter system which just pull out and the new one pushes in, the iSpring system has a relatively simple and quick filter change.

To change the filters, simply loosen the housing with the plastic spanner wrench supplied with the system. Then unscrew by hand (there may be some water spilled at this stage) and take the old filter out. Push the new filter in place, apply some Vaseline to the “O” ring and screw in the housing. Finally tighten it up with the spanner.

Water Efficiency

The water efficiency of a RO system is measured in how much water is wasted to produce 1 gallon of pure drinking water. In older systems as much as 6 gallons or water is wasted to produce a gallon of pure water. With the iSpring RCC 7 the waste water is only 2 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.

Ease of Installation 4.5/5

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 booster pump is needed or, if above 80 psi a pressure regulator should be used.

The whole RCC 7 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 possible complication is in mounting the dispensing faucet if you don’t already have an available hole in your sink, but this would be the same for any system. 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 in a step by step fashion. 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. This locking uses a clip that needs to be removed before pushing the plastic pipes in place.


  • Water output per day – 75 gallons
  • Filter life – about 6 months, although this can be extended or shortened depending on the quality of the feed water
  • DIY installation in about 1 hour
  • Water leakage alarm included in the kit
  • Membrane replacement – 2 to 3 years depending on quality of feed water
  • Removes up to 98% of chemicals, heavy metals, sediment, and other contaminants
  • Waste to pure water ratio 2:1 (depending on feed water pressure and temperature)
  • Made in the US
  • Lifetime US based customer support
  • Warranty – 1 year’s manufacturer’s limited warranty with a 30 day money back guarantee


  • The filter life is shorter than some competitor systems, however, the replacement cartridges are relatively inexpensive.

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Conclusion 4.9/5

Our in-depth iSpring RCC 7 review shows this system to be a very economical and easy to install. The only area of concern was that the filters advertise a relatively short life when compared to competing systems. This shorter life should be 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. 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 price, the relatively low volume of wasted water, and the quality of the pure water delivered, the iSpring RCC 7 is a highly recommended RO system.