Reverse Osmosis to Recycle your Pool Water

Reverse Osmosis Pool Filtration

in Los Angeles, Santa Barbara & Ventura counties

(818) 292-7267
  • Reverse Osmosis
    Pool Water Filtering System
  • Reduce Water Usage by 90%
  • Years of Experience Servicing
    Southern California
  • Looking out for your
    Health and Safety

How does Reverse osmosis work?


Rob's Pool Water Recycling operating the Reverse Osmosis System

Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove larger particles from water. In reverse osmosis, an applied pressure is used to overcome osmotic pressure, a colligative property, that is driven by chemical potential, a thermodynamic parameter.

Reverse osmosis can remove many types of molecules and ions from solutions, including bacteria, and is used in both industrial processes and the production of potable water. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side.

To be "selective", this membrane should not allow large molecules or ions through the pores (holes), but should allow smaller components of the solution (such as the solvent) to pass freely. In the normal osmosis process, the solvent naturally moves from an area of low solute concentration (high water potential), through a membrane, to an area of high solute concentration (low water potential). The movement of a pure solvent is driven to reduce the free energy of the system by equalizing solute concentrations on each side of a membrane, generating osmotic pressure. Applying an external pressure to reverse the natural flow of pure solvent, thus, is reverse osmosis.


The process is similar to other membrane technology applications. However, key differences are found between reverse osmosis and filtration. The predominant removal mechanism in membrane filtration is straining, or size exclusion, so the process can theoretically achieve perfect exclusion of particles regardless of operational parameters such as influent pressure and concentration. Moreover, reverse osmosis involves a diffusive mechanism, so that separation efficiency is dependent on solute concentration, pressure, and water flux rate. Reverse osmosis is most commonly known for its use in drinking water purification from seawater, removing the salt and other effluent materials from the water molecules.

The Reverse Osmosis Process for Water Filtration

Osmosis is a natural process. When two liquids with different concentrations of a solute are separated by a semipermeable membrane, the fluid has a tendency to move from low to high solute concentrations for chemical potential equilibrium.

Formally, reverse osmosis is the process of forcing a solvent from a region of high solute concentration through a semipermeable membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure. The largest and most important application of reverse osmosis is the separation of pure water from seawater and brackish waters; seawater or brackish water is pressurized against one surface of the membrane, causing transport of salt-depleted water across the membrane and emergence of potable drinking water from the low-pressure side.

The power of reverse osmosis is immense. Watch this colossal project utilizing reverse osmosis to generate 4 million gallons of pure water per hour!


The membranes used for reverse osmosis have a dense layer in the polymer matrix—either the skin of an asymmetric membrane or an interfacially polymerized layer within a thin-film-composite membrane—where the separation occurs. In most cases, the membrane is designed to allow only water to pass through this dense layer, while preventing the passage of solutes (such as salt ions).

This process is best known for its use in desalination (removing the salt and other minerals from sea water to get fresh water), but since the early 1970s, it has also been used to purify fresh water for medical, industrial, and domestic applications.

What is the Cost of Recycling your Pool Water?

Estimating is very simple, we just need your pool dimensions to provide a basic quotation. Contact us to get started!

Our Background


With several years' experience and dozens of satisfied clients in the Ventura and Los Angeles counties, stands by the quality of its work and guarantees a job well done from the first visit.

We treat your pool as if it was yours. Your family's safety and health are paramount for us. Rest assured that we will verify all chemical levels so that your pool experience is enjoyable... and safe for your skin.

Recycling your pool water is one of the wisest decisions you can make. It benefits your pool equipment, the quality of the water where you swim, your pocket and the environment, just in a few hours.


Save water, money and health problems. Recycle today.

What does Reverse Osmosis Remove from Pool Water?

Reverse Osmosis is capable of removing up to 99%+ of the dissolved salts (ions), particles, colloids, organics, bacteria and pyrogens from the feed water (although a reverse osmosis should not be relied upon to remove 100% of bacteria and viruses). An reverse osmosis membrane rejects contaminants based on their size and charge. Any contaminant that has a molecular weight greater than 200 is likely rejected by a properly running RO system (for comparison a water molecule has a MW of 18). Likewise, the greater the ionic charge of the contaminant, the more likely it will be unable to pass through the RO membrane.

Reverse Osmosis is very effective in treating brackish, surface and ground water for both large and small flows applications. Some examples of industries that use RO water include pharmaceutical, boiler feed water, food and beverage, metal finishing and semiconductor manufacturing to name a few.

Calcium Removal

Reverse Osmosis Water Filter Systems are a valid option for use in pools and spas. Municipal water contains high levels of calcium and other minerals that cause hardness in water. A small amount of calcium is recommended in pools (150-250 ppm), but once the water in the pool begins to evaporate, the levels of calcium spike dramatically. This causes buildup on the liner, the water line against the tile and in the pool equipment. Calcium becomes very troublesome for owners of swimming pools because it ruins the decorative tile and also causes water chemistry issues.

Chlorine is an important chemical for pools, but calcium absorbs the much needed chlorine. This can force a pool to go out of service. The first instinct is to add more chemicals to balance out this problem, even though doing so can cause more problems and create more work for the homeowner, but using a reverse osmosis water filter system is a much easier and eco-friendly alternative.

Instead of draining the entire pool and then fill it up with the same municipal water containing high levels of calcium, the more viable option is to recycle the pool water, filtering out all the contaminants using a reverse osmosis water filter system. With this method, you can conserve up to 90% of the water that was in the pool.

Using a reverse osmosis water filter system to filter out harsh chemicals such as calcium, salts and other hardness minerals will expand the life and maintenance of the swimming pool equipment. Along with the reverse osmosis membrane, a reverse osmosis water filter is used to help filter out unwanted chemicals. The reverse osmosis water filter helps filter out chemicals such as calcium, cyanuric acid, salts and alkalinity levels in the pool.


Rob's Pool Water Recycling provides reverse osmosis pool filtration in Agoura Hills, Bardsdale, Bell Canyon, Calabasas ,Camarillo, Carpinteria, Casitas Springs, Cornell, Dulah, Faria Beach, Filmore, Goleta, Hidden Hills, Hidden Valley, Hope Ranch, La Conchita, Malibu, Meiners Oaks, Mira Monte, Mission Canyon, Monte Nido, Montecito, Moorpark, Mussel Shoals, Oak Park, Oak View, Ojai, Oxnard, Santa Barbara, Santa Paula, Saratoga Hills, Simi Valley, Summerland, Thousand Oaks, Toro Canyon, Ventura and Westlake Village.

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