Choosing the right reverse osmosis water purification system can be a daunting task. There are so many brands to choose from and each system comes with its own unique features. In this buying guide, we will compare the Express Water which comes with leak detection, extensive customizability as well as easy installation and the iSpring against the iSpring which comes with a 6 stage water purification system, a transparent 1st stage outer casing as well as a water production capacity of up to 75 gallons per day. Which water purification system beats the other? We will compare the two water purification systems head to head and help you make a judgment as to which system is best for you.

Alternatively, just skip to either the Express Water or the iSpring on Amazon.

Table of Contents

Quick Comparison Table Express Water vs iSpring

Express Water RO5DXiSpring
ImageExpress Water vs iSpringExpress Water vs iSpring
Under SinkYesYes
Leak DetectionYeskleenex vs doveNo
Transparent?NoYes – 1st stage
Easy to installYesYes
Production capacity50 gallons per day75 gallons per day
Removes 1000+ contaminants?YesYes
Requires Electricity?NoNo
Filter changingTwice a yearTwice a year
 Price  Check Price Check Price

Key Similarities between the Express Water and the iSpring

  • Under sink installation
  • Filter changing
  • Easy to install
  • Contaminant removal
  • Electricity requirement

Key Differences between the Express Water and the iSpring

  • Leak Detection
  • Customizability
  • Water purification stages
  • Design
  • Production capacity

A Comprehensive Comparison between the Express Water and the iSpring

Under Sink Installation

The Express Water RO5DX and the iSpring RCC7AK are both reverse osmosis water purification systems. Such systems can be installed in a wide variety of configurations such as over counter, under the sink and some do not require any installation at all as they are portable. In the case of these two systems, you can use them under your sink. If you want, you can install them in your basement but you may need additional pipes and even a booster pump.

Filter Changing

The filters are arguably the most important part of a water purification system. They are responsible for separating the unwanted substances from the clean water. In order for you purification system to work as efficiently as possible, they need to be changed as frequently as the manufacturer recommends. Both the Express Water RO5DX and the iSpring RCC7AK have filters that need to be replaced twice in a year. Of course, this figure may vary depending on use. If you use a lot more water than the average consumer then you may have to change them more often.


Installing the Express Water and the iSpring is not hard at all. These water purification systems were designed for do it yourself installation. The process is pretty straightforward and all parts necessary for installation are included. You will be guided by instructions that are clear and well organized. In addition, there are instructional videos that are available. If you prefer having a person walk you through the process, the technical support teams from both companies will be glad to assist you.

Contaminant Removal

Both the Express Water RO5DX and the iSpring RCC7AK and the iSpring remove a wide host of contaminants. These contaminants are present in the tap water that we drink. These reverse osmosis systems are able to remove contaminants such as chlorine, fluoride, lead, arsenic, calcium, sodium and more. This allows your dirty, contaminated water to be converted into clean, pure and healthy drinking water that is safe for you and your family.


Different water purification systems work using different principles. Some use electrical energy in the water purification process. The Express Water RO5DX and the iSpring RCC7AK do not. They, instead, use water pressure for the purification process. This is an advantage as you do not need to worry about your bill being pretty high due to the use of these water purification devices.

Leak Detection

When installing a water purification system, it is important to ensure that there are not any leaks present. Leaks can easily ruin your furniture and if left unchecked, they can even end up completely ruining your floor. The Express Water RO5DX comes with the leak detection facility. This allows the water system to shut off water flow when it detects unwelcome moisture. This protects your floors and equipment from damage. The iSpring RCC7AK does not have this feature. This means the Express Water is superior to the iSpring in this regard.


The ability to customize a particular product to meet one’s exact needs is something that people yearn for so much that entire industries have been made around this concept. The Express Water is better than the iSpring as it allows for the user to upgrade the system by using UV water filters, Alkaline water filters, Deionization water filters as well as quick connecting fittings. The iSpring does not come with such features out of the box.

Water Purification Stages

Both the Express Water and the iSpring are reverse osmosis water filtration systems but that does not mean that the water purification process is identical in each device. A traditional reverse osmosis system has up to 5 stages. The last stage involves the use of activated carbon to add flavor to the water and make it taste good. The iSpring is equipped with more stages than the Express Water. It has 6 stages with the last stage being the Alkaline Remineralization stage. This allows the water purification system to restore the natural alkalinity and mineral balance of water.


The Express Water and the iSpring come in very different designs. The Express Water is a lot more colorful than the iSpring. These unique colors are not only present to make the device look good but they also form a label color matched system. This helps you to know exactly where each device goes. The iSpring however, also comes with a unique design. The first stage filter comes with a transparent casing. This allows for you to visually inspect the sediment filter and view the contaminants being removed from your water. This allows you to know when it is time for a filter change before a problem occurs.

Production Capacity

The iSpring is able to produce up to 25 gallons more than the Express Water. It can produce 75 gallons per day. This is a lot of water. It is probably enough to cater for the water needs of a big family or even a small office. The Express Water can only produce 50 gallons of water per day. This is no mean figure. This amount of water allows an average sized family to have enough water to drink for the whole day. This makes it suitable for those with small families or in environments where not much water is consumed in a day.

Our Pick

We found the Express Water to be the winner. This is because of the extra features that it has. It comes with leak detection capabilities and it automatically shuts of the water supply once a leak has been found. It is customizable, allowing you to add UV water filters making it perfect for using a wide variety of water sources e.g. water from wells. It comes with a color coded system which makes installation and maintenance very easy. In addition, we just love its design more than that of the iSpring.

Why Do You Need a Reverse Osmosis System?


Did you know that the water that comes from the tap is polluted with contaminants ranging from bacteria and viruses to potentially poisonous metals? Well it is true. If you take a sample of the water that you drink from the tap to a lab, you probably will not want to drink water from that tap ever again. Reverse osmosis systems such as the Express Water and the iSpring are able to remove such harmful contaminants leaving you with clean, fresh, healthy water.


Different people who live in different areas have different needs when it comes to water treatment. For individuals who live in the remote parts of the country where they get water from wells and other relatively untreated water sources, there is a need for more processing to take place. That is where reverse osmosis systems such as the Express Water shine. Such systems allow you to add on UV filtering components to help keep your water as clean as possible.

Easy to Install

Reverse osmosis systems are relatively easy to install. Of course, not all of them will be super easy to install, but most systems are like the Express Water and the iSpring. They come with detailed manuals that are very easy to follow. In addition, they do not have complicated circuitry that you need to first decode then implement.


Reverse osmosis systems do not use electricity. They use the water pressure that is present in the water line to carry out the purification. This means that you do not need to worry about your bill going up due to you trying to improve the quality of your drinking water.

Factors to Consider When Choosing between the Express Water and the iSpring

Leak Detection

No system is perfect. Every system is prone to faults. Water systems have one major fault that they are prone to – leakages. These leakages can easily damage equipment as well as infrastructure if the leaks go uncheked. The Express Water comes with the leakage detection facility which automatically shuts the water supply if unwanted moisture is detected.


This is quite an important factor to consider when choosing between these two brands. If you are a user who finds the features provided by the reverse osmosis systems to be sufficient then either choice will work for you. If you may want to upgrade your system, perhaps, because you want to move to an area in which the water is not treated as well as you would want it to be, then consider going for the Express Water. It allows you to add additional modules such as UV modules. This will help to ensure that your water is as clean as possible.

Water Purification Stages

The iSpring comes with more water purification stages than the Express Water. This is because it has an additional stage at the end. This is the alkaline remineralization stage. This restores healthy minerals and produces a balanced alkalinity, giving the water a better taste. If you find this feature to be relevant to you then go for the iSpring. We find the Express Water to produce water that is perfect for drinking and quite tasty too!

Water Capacity

This is another important factor to look out for. Different families have different requirements. If you have a large family and you drink a lot of water, then going for the iSpring which offers 75 gallons per day will be quite a wise move. If you have a small office, then the iSpring would also be a good option. If you, however, have a small family or if you do not consume a lot of water then it would be a good idea to take a look at the Express Water and see if it suits your needs.


Both the Express Water and the iSpring are relatively easy to install. However, as you probably know, when there are two products made by two different companies, one is bound to be better than the other when it comes to the installation process. Try to have a look at both devices and select the one that you find a lot of reviews pointing out that it is super easy to install.

Express Water vs iSpring FAQs

Are they Easy to Install?

Yes they are. There are a ton of resources out there made to help the installation process be as easy as possible. You can also phone in and have a tech support agent walk you through the installation process.

Do they Remove Fluoride?

Yes these systems do remove fluoride.

Can I use them with a Private Well?

Yes you can. You may probably want to add an additional system e.g. UV to ensure that you kill all the nasty viruses.

Do they Need Electricity?

No. They operate using the pressure that comes from the water.

How can I check the Water Quality?

In order to do so, you may have to purchase a TDS meter. Alternatively, you can take a sample of the filtered water to a laboratory and have it tested.


In this article, we explored the similarities and differences that are present between the Express Water and iSpring reverse osmosis water purification systems. We found the Express Water to be the clear winner. This is be cause it comes with customization options that allow for it to be used to clean water from a wide variety of sources, which includes water from wells as you will simply add a UV component to kill all the nasty viruses and germs. It comes with leak detection which enables it to automatically shut off the water supply when any unwanted moisture is detected. In addition to all this, it comes with a color coding system which makes the installation and maintenance process very easy to carry out.

We included quite a comprehensive list of features that we believe you need to consider when you are choosing between the two reverse osmosis water purification systems. This will help you to choose which reverse osmosis water purification system best suits your needs for your particular application.

Check out the best reverse osmosis water purification system, the Express Water on Amazon.