Reverse Osmosis Systems

What is Reverse Osmosis?

It’s important to have clean, pure drinking water in your home, and hard water makes that difficult in the San Antonio area. At Kinetico San Antonio, we have your solution.

Our Aquakinetic and K5 Reverse Osmosis Drinking Water Systems are brilliantly designed and unmatched in gallon per day production and contaminant removal – 99.9% pure water!

  • The K5 removes more contaminants than any other reverse osmosis system by utilizing a multi-step filtration system, including two customizable filters for your area specific problems. We offer Flex Filtration options to customize your system to fit your needs. You can opt for additional protection with the VOC Guard, Arsenic Guard, Purefecta Guard or Perchlorate Guard. Flex Filtration also offers Mineral Plus, an option for those who prefer the taste or health benefits of the minerals that are lost in filtration. K5 owners can pick two of these five options for purified water tailored to their tastes.
  • The Aquakinetic system features a high-capacity, pre-filter reverse osmosis membrane and carbon post-filter. This small, low-maintenance system comes with an attractive lead-free faucet to dispense your purified water for clean drinking.

Understanding How RO Systems Work

Reverse osmosis water systems have transformed water purification, taking on projects like seawater desalination and wastewater purification. Before we can talk about reverse osmosis, you need to understand what osmosis is. As a solvent moves through a semipermeable membrane into a concentration of higher solute, it equalizes both concentrations on each side of the membrane, giving you the process of osmosis.

Lost? No worries.

To break that down, visualize a glass divided down the middle by a “semipermeable membrane,” AKA a filter. On one side, you pour a solution of water and salt. On the other side, you pour the “solvent,” AKA plain water. The plain water now moves through the filter to balance out the salt water side and reach osmotic pressure (the amount of pressure needed to nullify osmosis). Simply put, water passes through a filter to dilute the more concentrated solution.

Now that you understand osmosis, how does reverse osmosis work? Just reverse the process! To make this process run in reverse, you need to overcome osmotic pressure by adding pressure. In this case, the pressure comes from your water pressure when you turn on tap water. With this pressure, the tap water will pass through the filter, leaving unwanted contaminants to be flushed away. All that’s left is pure, clean drinking water. The Kinetico RO water system removes all contaminants larger than 0.0001 microns.

What Contaminants Does an RO System Protect Against?

Contaminants in drinking water vary from place to place, so it’s a good idea to have your water tested to see what protection you need. With the Flex Filtration options mentioned above, you can choose specific protections designed to fit your needs. The VOC Guard protects against volatile organic compounds that commonly contaminate drinking water, such as cleaning supplies, pesticides and paint. The Purefecta Guard removes nearly 100% of bacteria and viruses from your drinking water. Viruses like Hepatitis A and bacterial infections like E. coli can be transferred through the ingestion of contaminated water. Kinetico will test your water for free and guide you to the correct drinking water system and Flex Filtration options to fit your needs.

All of Kinetico’s water systems are environmentally responsible and will help you and your family do your part in protecting the environment. An in-home water purification system will keep you from buying bottled water, putting a stop to all the waste that comes along with that. Contact us today for energy-efficient, low-maintenance systems to keep you happily hydrated with the purest water possible.

Drinking Water Systems

Explore more Kinetico water systems and decide which is the right fit for your lifestyle.


With a Kinetico K5 system, you have the very best Reverse Osmosis (RO) system on the market.


Our AquaKinetic Drinking Water Systems are economical systems that improve the taste and purity of your drinking water.


The MACguard Filtration System is the perfect choice for people looking to remove unpleasant tastes or odors.

Trusted by San Antonio Companies and Homes

Kinetico Water Softeners are rated 4.9 out of 5 from over 1,000 reviews.

Jonathan Myers

We're very glad we got this installed. The technician, Alberto, was very polite and thoroughly explained what he was doing and what we would need to do.

Kyle James

Alberto kept me informed on his arrival time. He was professional and exceeded my expectations concerning the install of the water filtration system. I also need to put a plug in for Tracy for her patience and skills at making things happen behind the scenes...a true unsung hero. They both deserve a raise!


I just had my system installed by Alberto and Jay, and I wanted to say that they rocked. Got it all in and gave me some instructions to follow, all while being determined to detail and professional. Thanks, fellas.