iSpring RCS5T 500GPD RO Water Filter Review

This iSpring RCS5T is a high capacity tankless RO water purifier that removes more than 1000 contaminants from tap water. Five different filter mediums, including the RO membrane, treat water in the best possible manner to make it clean and safe for drinking.

This filter system has an impressive water production capacity. Also, the built-in booster pump increases the water pressure and purified water production. Moreover, it has a space-saving design and can be installed easily.

  • Flow Rate: 3 gallons/day
  • Efficiency: Removes 1000 pollutants
  • Filter life: 2 – 3 years

More Features: This is a 5-stage water filter system. It removes dust, rust, silt, organic particles, chlorine, odor and cloudiness.

iSprin RO water purifier



Type of Filter: The iSpring RCS5T 500GPD RO water filtration system is designed to install under a standard kitchen cabinet. You can buy it for residential use, office use, and as well as for restaurants.

Filtration Stages: It is featured with five stages of filtration.

Filter Media: There is a Polypropylene Sediment Filter, GAC (Granular Activated Carbon) Filter, Carbon Block Filter, Dual-flow RO Membrane, and the Post Carbon Filter.

Extraction of Impurities: It removes up to 99% of more than 1,000 pollutants.

The first stage of filtration includes a 5-micron, 10-inch high-capacity PP Sediment Filter that removes dust, rust, silt, and organic particles. The Granular Activated Carbon Filter eliminates chlorine, taste, and odor, along with colors and cloudiness.

The Carbon Block Filter extends the life of the RO membrane by removing any residual chlorine, tastes, and odors. After that, the RO membrane (0.0001 microns) makes water free from heavy metals and other harmful contaminants and impurities.

The last filtration stage features a Post Carbon Filter of 10 inches that extract any residual taste and odor from the tank.

Water Production Capacity: It has an impressive water production capacity of 500 gallons per day or 0.34 gallons per minute under ideal conditions. But the production capacity may vary because of temperature, water chemical properties, and different other factors.

Waste Water Ratio: The iSpring RCS5T wastes 1 gallon of water to give 1 gallon of pure and clean water.

High-Efficiency Booster Pump: It is also powered by a high-efficiency booster pump that is responsible for increasing the purified water production. It raises water pressure and maximizes the RO production rate.

Filter Life: The life of the membrane filter is 2 to 3 years at 3 gallons per day.

Installation: The installation and replacement of the filter are quite easy. Well-organized instructions and videos will help you during each step of your installation.

Operating Water Temperature Range: Between 40F and 100F

Incoming Water Pressure: The incoming water pressure ranges between 30 psi and 70 psi.

Weight: It weighs 32.7 pounds.

Included Components: The kit includes cartridge set, frame, hardware, and printed instructions for installation. Also, a lead-free faucet with chrome finish is included in the package.

Other than this, to increase the water flow and get a continuous supply of water, you must add a storage tank that is required to buy separately.

You need a smallest pressurized tank of 0.5 to 3 gallons for residential use and a small pressurized tank of 3 to 5 gallons for office use. And for restaurant use, a medium pressurized tank of 3 to 10 gallons is ideal to buy.

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My Opinion:

Pros: The iSpring RCS5T water filter removes various harmful contaminants from water to offer clean, safe, and healthy drinking water. It has excellent water filtration capacity and an exceptional waste water ratio. It also operates quietly and features a built-in booster pump.

Cons: The booster pump needs a power source that limits the installation options.


Can I use the iSpring RCS5T system to filter hot water?

No, you cannot use this system to filter hot water because it only works with cold water. Water temperature above 100 degrees Fahrenheit can affect the efficiency of the system as well as damage the filters.

Does this filtration system backwash automatically, or we need to flush it manually?

There is no need to do anything manually. It backwashes automatically to keep the RO membrane clean and work efficiently and effectively.

Does temperature affect the water flow rate?

Yes, the temperature does affect the flow rate. Expect a 3% flow rate reduction for each degree decrease in water temperature—likewise, the flow rate increases when water temperature increases.

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