iSpring RCC7 Reverse Osmosis Review

iSpring RCC7 Reverse Osmosis Review (2022)

The iSpring RCC7 is a two in one reverse osmosis filter and water softener. It removes up to 1000 contaminants with an efficacy of up to 99%. The under-sink filtration system is efficient and easy to install and maintain. In addition, it is NSF certified and backed up by a 1-year warranty.

Below is a detailed iSpring RCC7 review.

iSpring RCC7, NSF Certified, 75 GPD High Capacity Under Sink 5-Stage Reverse Osmosis Drinking Filtration System, Brushed Nickel Faucet
2,192 Reviews
iSpring RCC7, NSF Certified, 75 GPD High Capacity Under Sink 5-Stage Reverse Osmosis Drinking Filtration System, Brushed Nickel Faucet
  • [CERTIFIED TO NSF/ANSI 58]: High Capacity Reverse Osmosis water filtration for fresh water. This under sink mounted RO water filter removes up to 99% of over 1, 000 contaminants, including lead...

Product Specifications

  • Model Number – RCC7
  • Dimensions – 15 X 8 X 18 inches
  • Weight – 20 pounds
  • Pressure – 40-70 psi
  • Warranty – 1Year

About the Manufacturer

iSpring Water Systems is a family-owned business in the USA specializing in water solutions for businesses and families. The company has been in business for over two decades and is headquartered in Greater Metro Atlanta.

Their range of filtration products includes reverse osmosis filters, whole house water filters, countertop filters, under sink filters, ultrafiltration systems, and any associated accessories or replacement parts.


5-Stage Filtration

5-Stage Filtration

The iSpring RCC7 is a 5-stage reverse osmosis system that produces cleaner, healthier, and safer drinking water. It is suitable for use with well water or city water.

In the first three stages, the water passes through different-sized pre-filters to remove large contaminants. It then proceeds to the reverse osmosis (RO) membrane to remove chemical contaminants such as chlorine and chloramine.

In the final stage of filtration, the water passes through the GAC filter for final polishing. By the end of the filtration process, you have crisp, clean water of higher quality than some bottled water.

Below is a detailed look at the 5-stage filtration process:

Stage 1: Polypropylene Pre-Filter 1

The polypropylene pre-filter of this filter system removes all large particles in the water, such as rust, soil, sediments, and dust.

Stage 2: GAC Pre-Filter

The second pre-filter comprises 5-micron granular activated charcoal (GAC), which removes cloudiness, taste, odors, and chlorine. Filtering these harmful contaminants prevents them from passing to the next filtration units. Therefore, ensuring that the carbon block filter and RO membrane operate at maximum efficiency.

Stage 3: Carbon Block Pre-Filter

The 5-micron pre-filter gets rid of chloramines, VOCs, and other chemical impurities.

Stage 4: Reverse Osmosis Membrane

The reverse osmosis membrane is a semi-permeable membrane with tiny 0.0001-micron holes that remove many contaminants that manage to get past the pre-filters. The 0.0001-micron holes only allow water to pass through and keep off residual impurities, including fluoride, lead, waterborne pathogens, etc.

Stage 5: GAC Filter

The GAC filter removes any residual taste or odors that may arise in the storage tank. The GAC filter is held in a 4-gallon metallic pressurized tank that also serves as a storage tank with a holding capacity of 3.2 gallons.

Premium Leak-Proof Design

NSF Certified

The iSpring RCC7 design and build are certified to NSF/ANSI 58. It is built with quality materials to ensure its reliability and durability. The quality components also ensure low maintenance of the unit. In addition, it goes through rigorous testing for cycle resistance, pressure, air leaks, and overall integrity.

See-Through 1st Stage Pre-Filter

The first stage pre-filter tank has a unique see-through design for easy inspection. The transparent housing lets you know when the filter cartridge needs to be replaced without opening the pre-filter housing to check.

3-Layered RO Membrane

The reverse osmosis membrane is made up of three layers of composite. It has a polyester support web that holds it together, a microporous polysulfide with numerous selective pores, and a thick polyamide barrier layer that helps the membrane withstand high water pressure and mechanical wear.

Connect Fittings and Color Coordinated Tubing

Its leak-proof design incorporates connect fittings and color-coordinated tubings, which also simplify the installation process. The fittings have a push-together design for easy fit.

O-Rings and Water Detector

The filter also comes with O-rings to reinforce seals. In addition, it comes with a water detector that triggers an alarm sound if moisture is detected underneath the unit.

Brushed Nickel Faucet

The iSpring RCC7 also comes with a European-designed brushed nickel faucet that is easy to mount. The faucet is lead-free, which ensures the water is not contaminated during dispensing.

Filtration Efficiency and Capacity

This reverse osmosis water filter gets rid of over 1000 contaminants. It removes up to 99% of all contaminants, including heavy metals, Total Dissolved Substances (TDS), herbicides, germs, bacteria, chlorine, etc.

It has a 75 gallons-per-day capacity which is larger than most other point-of-use filters in its category. The recommended pressure range is 45-70psi. If higher, you will need to install a pressure valve, whereas if lower, you will need to use a booster pump to enhance the RO efficiency.

The unit has a 3:1 waste water ratio. Its maximum TDS capacity is 750ppm, while the recommended operating temperature range is 40-1000F.

Ease of Installation

Ease of Installation

This reverse osmosis filtration system is quite easy to install within a few hours. The filter fits well even under a standard kitchen sink. You only need to attach the tubing with no need for threading pipes. And should you need help, the iSpring customer service is a phone call away to provide technical guidance.

Upon buying the iSpring RCC7 Reverse Osmosis filter, the manufacturer sends a package containing all the parts and accessories you need for a complete setup. They also provide an instructions manual and a step-by-step video tutorial online on their YouTube Channel.

Parts List

  • Machine head with RO housing and 5th stage FT15
  • 3 Pre-filter housings
  • F3 pre-filter pack
  • Premium RO membrane
  • 2-gallon pressurized tank
  • Housing wrenches
  • 4, ¼-inch color-coded tubes
  • Spare fittings
  • O-rings
  • Feed Water adapter
  • Drain saddle
  • Water detector
  • Brushed nickel faucet
  • Tank valve
  • Tank stand
  • Automatic shut off valve
  • Teflon tape
iSpring RCC7, NSF Certified, 75 GPD High Capacity Under Sink 5-Stage Reverse Osmosis Drinking Filtration System, Brushed Nickel Faucet
2,192 Reviews
iSpring RCC7, NSF Certified, 75 GPD High Capacity Under Sink 5-Stage Reverse Osmosis Drinking Filtration System, Brushed Nickel Faucet
  • [CERTIFIED TO NSF/ANSI 58]: High Capacity Reverse Osmosis water filtration for fresh water. This under sink mounted RO water filter removes up to 99% of over 1, 000 contaminants, including lead...

How to Install

Before beginning the DIY installation process, go through the instruction manual to get a sense of what you will be doing. Next, ensure your installation location provides adequate space for the filter’s dimensions.

Note that the filter is intended for indoor use and installation. Do not install it directly on a hot water line or in an area with high temperatures. Also, ensure to comply with the local or state plumbing codes.

The product document provides a detailed step-by-step process for installing. However, below is a summary of the steps involved.

  1. Gather your tools. Apart from the parts that come with the iSpring RCC7, you will also need the following tools:
  • Variable speed drill with two bits. ¼” for drilling through the PVC drain pipe and ½” for drilling through the countertop to create room to fit the faucet.
  • Philips head screwdriver
  • Utility knife or scissors
  • 5/8”, 9/16” open-end wrench, pliers, or adjustable wrench
  1. Turn off the cold water supply to the kitchen sink and open the kitchen faucet to release pressure.
  2. Install the feed water adapter.
  3. Install the lead-free nickel faucet. If your kitchen sink already has a faucet, you only need to replace the old one with the new one. Otherwise, you will need to drill a hole through the sink for the faucet.
  4. Install the faucet bracket that comes with the iSpring RCC7 package.
  5. Install a drain saddle in an ideal location. Ideally, install it on a horizontal pipe to minimize dripping.
  6. Install each pre-filter in their housing in the right position. If you are mounting or hanging the unit, including the support bracket at the bottom of each pre-filter’s housing.
  7. Install the tank shut-off valve.
  8. Install the reverse osmosis membrane.
  9. Start the system. Turn off the tank shut-off valve and disconnect the tubing to the RO membrane. Open the feed water adapter valve and the cold-water supply. Flush out the pre-filters until the outlet water is clear. Reconnect the RO tubing and turn on the shut-off valve. Open the faucet and notice if the water starts trickling in.
  10. Once done with the installation, double-check to ensure all the fittings are secure using the provided housing wrench. If the inlet water pressure exceeds 80psi, install a pressure regulator. Finally, inspect all the connections for leaks.

Here is a detailed DIY installation video of the iSpring RCC7.

Care and Maintenance

The filters and RO membrane need to be changed periodically to keep the filter working optimally. The product manual provides steps for replacing each part. Below are the recommended replacement timelines for the various parts:

  • Pre-filters – every six months
  • RO membrane – every 2-3 years
  • GAC filter – every 12 months

Avoid hitting, dragging, or dropping the unit during installation or in the course of use, as it can cause it to crack or leak. The feed water should be free from manganese, iron, and hydrogen sulfide, and its pH should range between 4 and 8.

Warranty and Support

ISpring offers a 1-year money-back guarantee and a 1-year warranty to back up the RCC7 quality. The manufacturer also provides lifetime technical support on this product and their other products.

The iSpring customer support is available via phone ((678) 261-7611) and email ( The customer service representatives can be reached via phone from Monday to Friday between 9.00 am and 5.00 pm Eastern time. iSpring product reviews across various platforms indicate that their customer service representatives are quite responsive and helpful.

Once your package arrives, inspect all the components for any damages. If any part is broken or cracked, contact the iSpring customer service to return or replace it. If it is in good condition, register it for a warranty on under the “warranty registration” tab or by emailing

The warranty covers the original purchaser against material, workmanship, or factory preparation defects.

Note that the warranty covers parts only as labor is excluded. It also excludes the following parts: O-rings, membranes, filters, and other parts that require regular replacement with ordinary use.

The warranty is valid only if the unit is installed, used, and maintained as per the instructions provided in the product manual.


  • Affordable
  • 5-step filtration process for clean, healthy water
  • Easy to install
  • Comes as a complete installation kit, including a faucet
  • One year warranty and money-back guarantee
  • Easily accessible and helpful lifetime customer support
  • Compact, modern design
  • NFS certified


  • Does not have a remineralize filter
  • 3:1 waste ratio


If you are looking for an efficient reverse osmosis filter for your home, look no further than the iSpring RCC7. Its 5-stage filtration system gets rid of up to 99% of impurities in your drinking water. It is economical to buy and maintain yet delivers clean, pure, great-tasting water. Its main downside is that as a reverse osmosis filter, it strips water off essential nutrients.


What is Reverse Osmosis Filtration System?

In reverse osmosis filtration, the pressure causes water to pass through a semi-permeable membrane. The membrane has microscopic pores that allow water to pass through but keeps off contaminants. As a result, the water that passes through is clean and healthy; it is referred to as permeate. However, the water leftover is concentrated with contaminants and is referred to as brine or wastewater.

Where Should You Install a Reverse Osmosis Filter?

There are different types of reverse osmosis filters. While most are under the sink filters, some are designed as whole house filters.

What Are the Benefits of Reverse Osmosis?

Reverse osmosis removes a wide range of contaminants that are not removable by other filtration methods. e.g., fluoride, chloramines, TDS, and VOCs. It also removes bad taste and odor.

Are There Disadvantages of Reverse Osmosis Filtration?

  • Reverse osmosis filtration does not remove some types of contaminants, e.g., bacteria and viruses.
  • Also, during the filtration process, the system drains away wastewater that contains contaminants. Most reverse osmosis filters have a water waste ratio of 3:1 and 4:1, which is significantly high. The wastewater can be either channeled into a treatment plant or to riverbeds.
  • Another main disadvantage of reverse osmosis is that it demineralizes water. Aside from removing contaminants, it also removes beneficial minerals

How to Remineralize Water Filtered Through Reverse Osmosis

There are several ways you can remineralize water filtered through reverse osmosis. First, you can buy a reverse osmosis filter that is fitted with a post-mineral filter. The post-mineral filters add minerals to the water and alkalize the water PH. If you already have a RO filter that does not have a demineralized filter, install a demineralized water filter separately. Alternatively, add a small amount of mineral salt (Himalayan salt) to your drinking water.

iSpring RCC7, NSF Certified, 75 GPD High Capacity Under Sink 5-Stage Reverse Osmosis Drinking Filtration System, Brushed Nickel Faucet
2,192 Reviews
iSpring RCC7, NSF Certified, 75 GPD High Capacity Under Sink 5-Stage Reverse Osmosis Drinking Filtration System, Brushed Nickel Faucet
  • [CERTIFIED TO NSF/ANSI 58]: High Capacity Reverse Osmosis water filtration for fresh water. This under sink mounted RO water filter removes up to 99% of over 1, 000 contaminants, including lead...

Amanda Perkins

Amanda began her career as a technical writer for a healthcare group in 2008. Years after getting married and starting a family, she joined her husband Joshua on the Water Filter Authority journey to educate other families and households about safe, affordable, and effective water filtration systems.