How to Choose a Whole House Reverse Osmosis System?

It’s no secret that water is an essential resource in our daily lives, and ensuring its quality is crucial for us. As a result, whole house reverse osmosis (RO) systems have gained popularity as an effective water filtration method. However, choosing the right whole-house RO system can be challenging for those who lack understanding in this area.

This guide will provide you, the reader, with the necessary information on choosing a whole house reverse osmosis system. In addition, we will explain the reverse osmosis process, the benefits of using whole house RO systems, and seven tips to help you choose the right reverse osmosis system for home water filtration.

Figure 1 Whole house RO systems

Understanding Whole House Reverse Osmosis Systems

Before diving into our selection process, it’s essential to understand what reverse osmosis (RO) is and how the whole house reverses osmosis filter system work. Reverse osmosis is a process opposite to osmosis. A semipermeable RO membrane removes contaminants, impurities, and dissolved solids from water, essentially purifying it.

Whole house reverse osmosis systems connect directly to the main water supply, ensuring clean and purified water throughout the entire house or building. Due to the ability to provide a building with enough filtered water, a whole house reverse osmosis system comes with a large storage tank.

This makes these systems quite large. But the space requirements shouldn’t put you off from purchasing one.

Benefits of Using Reverse Osmosis Systems

Whole house reverse osmosis systems offer numerous benefits, making them an attractive choice for water filtration. Some of these benefits include:

  • High-Quality Water: Reverse osmosis systems effectively remove various contaminants, such as chlorine, lead, bacteria, and viruses, resulting in clean and safe drinking water.
  • Improved Taste and Odor: By removing impurities and chemicals, reverse osmosis systems can significantly enhance the taste and odor of water.
  • Health Benefits: Drinking purified water from a reverse osmosis system can improve overall health by eliminating potentially harmful substances.
  • Convenience: With a whole house reverse osmosis water filter, you can purify water from any tap in your home or business, eliminating the need for individual filtration units.

7 Tips for Choosing the Right Whole House Reverse Osmosis System

1. Ability to Remove Contaminants

A key consideration when choosing a whole house reverse osmosis (RO) system is its ability to effectively remove contaminants from the water supply. Whole house RO systems are renowned for their exceptional contaminant removal capabilities. But not all whole house RO systems can do that.

Most systems come with a reverse osmosis membrane that eliminates solids from your water. But you should look for a whole house reverse osmosis water filter that can remove chemicals and bacteria. That’s precisely why the right whole house reverse osmosis system includes additional filtration stages, such as an activated carbon filter, to effectively eliminate volatile organic contaminants (VOCs) and pesticides.

2. Gallons Per Day Capacity (GPD)

When choosing a whole house reverse osmosis (RO) system, considering its Gallons Per Day Capacity (GPD) is crucial. The GPD refers to the amount of water (purified water) the system can produce daily. Understanding and assessing the GPD capacity of a system is essential to ensure that it meets the water demands of your household. To do that, you must determine your household water consumption needs.

Additionally, the right GPD capacity ensures optimal performance and efficiency. If a particular whole house reverse osmosis system has insufficient GPD capacity, it will result in limited water availability, reduced water pressure, and a much slower water flow rate.

Figure 2 Reverse osmosis (RO) system GPD

3. Price and Cost Considerations

The unit’s price is also crucial when choosing a whole house reverse osmosis filter system. While the system’s initial cost is an important aspect, it’s equally important to consider the long-term expenses associated with maintenance, reverse osmosis water filter replacements, and potential energy consumption.

Unlike RO systems that go under the kitchen sink, high-quality whole house units consume electricity, in addition to being much more expensive. This naturally increases your electrical consumption and, thus, the overall cost of running a whole house RO system.

As a result, it’s important to strike a balance between quality and affordability.

4. Space Requirement

Whole house reverse osmosis systems are typically large and require ample installation space compared to standard water filtration systems. These systems consist of various components and specialized RO equipment, including pre-filters, post-filters, a reverse osmosis membrane, storage tanks, and associated plumbing connections.

Furthermore, whole house reverse osmosis systems are typically installed near the main water supply line, meaning the pre-treatment operations require sufficient space for proper airflow and ventilation. The storage tank is another important factor worth considering. Since whole house reverse osmosis filter system incorporate much larger storage tanks, you must assess your space to determine if the tanks can be fitted appropriately.

5. Ease of Installation

Whole house reverse osmosis systems are complex systems that might require professional assistance. But that doesn’t mean all systems are equally challenging to set up. That’s why you should consider the ease of installation when selecting a whole house reverse osmosis water filter for your home.

Some whole house RO systems may require professional installation, while others offer a user-friendly setup that can be done as a DIY project. Therefore, choose a system that aligns with your installation preferences and capabilities.

6. Ease of Maintenance

Regular maintenance is essential for the optimal performance of a whole house reverse osmosis equipment. Whole house RO systems come with filters that must be replaced periodically. Considering the importance of water filters, the right system must offer easily accessible filter housings and quick-change filter cartridges for convenience.

Furthermore, the unit’s filter lifespan and recommended replacement frequency must align with your overall budget. It’s also helpful to consider the availability and affordability of replacement filters for the specific system you are considering.

7. Lifespan

Considering the price of a whole house reverse osmosis system, the goal is for these systems to cover all of your water treatment needs for a long time. So naturally, you want to purchase a unit made of stainless steel, plastic polymers, and other metals designed for longevity. Moreover, the warranty is another important factor to consider when it comes to the unit’s lifespan.

Evaluate the expected lifespan of the system before making a purchase. A longer lifespan indicates a durable and reliable system, reducing the need for frequent replacements and saving you money in the long run.


Choosing the right whole house reverse osmosis system requires careful consideration of contaminant removal ability, capacity, price, space requirements, ease of installation and maintenance, and lifespan.

By following these seven tips and understanding the benefits of reverse osmosis systems, you can make an informed decision and ensure clean and purified water throughout your home. Invest in a high-quality system that suits your needs, and enjoy the numerous advantages of having access to safe and pure water at your fingertips.

Can NEWater Provide You With a Whole House Reverse Osmosis System for Pure Water?

If you’re searching for a whole house reverse osmosis system to cover all of your water purifying needs, look no further than NEWater. We have been in the water purifying industry for over twenty years and have a proven track record of delivering pure and clean water to households and businesses.

Our whole house RO systems are designed to remove a wide range of contaminants, ensuring your household has access to high-quality and pure drinking water. From sediment and chlorine to heavy metals and bacteria, our systems are built to provide comprehensive filtration and purification without compensating convenience.

Feel free to contact us for any inquiries.


1. How does a Whole House Reverse Osmosis System Work?

A whole-house RO system works by removing contaminants from water through filters. The filters have semipermeable membranes that catch all kinds of contaminants, allowing only pure water to pass through and be ready for consumption.

2. How to Choose a Reverse Osmosis System?

Paying attention to the important factors is crucial to make the right purchase. Those include:

  • The system’s ability to remove contaminants
  • The system’s gallons per day (GPD) capacity
  • The system’s upfront price and additional costs, such as filter replacements and maintenance
  • The system’s space requirements
  • The system’s ease of installation
  • The system’s ease of maintenance
  • The system’s lifespan

3. What Does a Whole House Reverse Osmosis System Cost?

A whole house RO system costs between $12,000 and $18,000, depending on several key factors, including removing harmful contaminants and bacteria, gallons per day capacity, filters, and more.

4. What is a Whole House Reverse Osmosis System?

A whole house RO system is a comprehensive filtration system that provides your entire house with safe and pure drinking water. The RO system is connected to the main water supply line and allows water to pass through the filters, where the RO membrane catches harmful contaminants and bacteria, allowing only pure water to go to the water tank and to the tap.

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