Is A Whole House Reverse Osmosis System Right For You?

Person thinking about reverse osmosis

What Is Reverse Osmosis ?

Reverse osmosis removes the largest spectrum of contaminants at the most economical cost of any water treatment process.  Essentially, a whole house reverse osmosis system will remove 98 to 99% of most contaminants including total dissolved solids (TDS), sodium, chloride, sulfate, nitrate, arsenic and a plethora of other chemical and organic contaminants. One of the key ingredients to a whole house reverse osmosis system is proper pre-treatment, which includes removing the iron, sulfur, manganese, tannin, chlorine, chloramine, and other nuisance elements.

Effective for PFOA / PFAS and thousands of others contaminants

Amoebic Cysts99.00%Nickel95.00%
Cryptosporidium Cysts97.00%Strontium97.00%
Giardia Lamblia Cysts99.00%Trihalomethane98.00%
Lead97.00%Volatile Organics95.00%
Magnesium97.00%Z, 4-D95.00%

Is A Whole House Reverse Osmosis System Necessary?

Speaking transparently, a whole house reverse osmosis system is only necessary for treating specific and very severe water issues. As a general rule we suggest that our customers purchase one of our water tests before buying a system. The test is sent off to an independent 3rd party laboratory for testing. This allows us to provide independent and unbiased facts to our customers regarding the underlying cause of their current water issues. More importantly, it allows us to provide different solutions to the water issues that our customers face. While reverse osmosis removes the largest spectrum of contaminants at the most economical cost of any water treatment process, you may just have a nitrate or arsenic issue. In this case, instead of recommending a whole house reverse osmosis system, we would recommend one of our Nitrate or inFusion systems, potentially saving you thousands of dollars.

But I Want A Whole House Reverse Osmosis System!

If your water issues need a whole house reverse osmosis system to be resolved, or if you want peace of mind knowing that your water is free of 98 - 99% of contaminants, then the Defender series RO system is right for you. The Defender is a professional grade whole-house reverse osmosis system built right here in the heart of the USA. Every system is built using commercial-grade components and is assembled and tested by highly skilled American craftsmen and women.

the defender by US Water Systems

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How To Size A Whole House Reverse Osmosis System

It is important when looking at a whole house reverse osmosis system that you choose a system that will meet your daily water needs. The generally accepted consensus is each member of a household will consume 60 -100 gallons of water per day. That is why our smallest whole reverse osmosis system is rated at 2,000 GPD, or approximately 81 - 84 gallons per hour. This means that it is able to effectively provide water for a house with up to 3.5 baths.

Is Pretreatment Essential?

A reverse osmosis system with proper pre-treatment will last 15-20 years. When a reverse osmosis system is run without proper pretreatment it will fail within a few weeks or months of operation. Since we sell over 10,000 products, we are able to provide our customers with options for the best pretreatment available.

Pretreatment Options

  • BodyGuard - Non-backwashing, non-electric special blend carbon filter for chlorine and chloramine removal
  • BodyGuard Plus - Backwashing special blend carbon filter for chlorine and chloramine removal
  • Anti-Scalant Injection - To prevent hard water from scaling the membranes. It is rejected by the membranes and eliminates the need for a water softener.
  • Bodyguard and Anti-Scalant together
  • Bodyguard Plus and Anti-Scalant together

What Are The Components Of A Whole House Reverse Osmosis System?

A quality whole-house reverse osmosis system is a combination of different high-performing components that work together to provide you with the purest water possible. 


  • Component 1 - A 5-Micron Pre-Filter should be used to protect the solenoids, membranes and pumps from silt, sand, and sediment.
  • Component 2 - The Reverse Osmosis Process itself, which separates the dissolved contaminants from water. The reverse osmosis process removes the widest spectrum of contaminants of any water treatment process.
  • Component 3 - Optional Re-mineralization and pH Neutralization.
  • Component 4 - The Storage Tank is where the water is stored while awaiting delivery to the home.
  • Component 5 - The variable Speed Delivery Pump delivers up to 20 GPM at 60 psi to provide incredible pressure throughout the entire home.
  • Component 6 - The Ultraviolet (or UV) Disinfection System is the last step of the system. It kills any waterborne or airborne bacteria that might be in the system.

Are Whole Reverse Osmosis Systems Eco - Friendly?

Without a doubt all reverse osmosis systems generate wastewater as a byproduct of water purification. The purified water (called permeate) is physically separated from the solution brimming with contaminants (called the brine) by the membrane. Most reverse osmosis systems on the market today produce clean water at a 1:1 ratio, meaning that 1 gallon of water is wasted for every gallon produced.  The US Water Systems Defender Series RO produces clean pure water at a 5:1 ratio, meaning that it produces 5 gallons of water for every 1 gallon of water wasted.

As you can see, you may or may not need a whole-house reverse osmosis system. The best way to tell is to purchase a water test and see all the options you have available based on the findings. If you have any questions, we have certified water professionals standing by to answer by phone, email, or web chat.  Quality of life begins with clean water.

June 17, 2020
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crystal white
January 1, 2021 at 5:48 AM
I live in 29582 zip code areas what whole system for my condo would you reccomend approx 1200 square foot with 2 full bathrooms?
Mark Timmons
January 10, 2021 at 5:23 PM
Our smallest one:
Jerry Terry
February 26, 2021 at 9:06 PM
Are all systems DIY?
Mark Timmons
March 15, 2021 at 7:49 AM
Yes, they can be DIY, but we have a growing network of installers across the country.