How Reverse Osmosis Works

Reverse Osmosis

Water is forced by the city water pressure against a reverse osmosis membrane.  The membrane has very small holes just large enough for water molecules to fit through.  Water molecules are some of the smallest molecules in nature.  Contaminated water is a water molecule with another, different kind of molecule attached to the water molecule.  When a water molecule has another molecule attached to it, it is too big to fit through the holes in a reverse osmosis membrane.   The membrane will not allow large molecules through.

The pure water molecules that are able to fit through the holes in the reverse osmosis membrane are collected in the storage tank.  The contaminated water molecules are put down the drain line that the kitchen sink drains into.

With a Reverse Osmosis Drinking Water System the water is also filtered through a sediment filter and a carbon filter.

The function of the sediment filter is to remove large particles that are carried in the water.  These particles may be sand, rust, algae, slime from inside the water pipe, etc.

The function of the carbon filter is to remove the chlorine that the city puts into it.  The carbon filter also removes gases that may cause an unpleasant odor.

To summarize:

  1. The water goes through the sediment filter.
  2. The water goes through the membrane.
  3. The water goes to the storage tank.
  4. When you turn on the RO faucet the water comes from the storage tank, through the carbon filter, through the faucet, and into your glass.


Reverse Osmosis Water Filters

3 Stage Reverse Osmosis (RO)

$19.97 Per Month 3-Stage RO Produces Bottled Quality Water Right At Your Home

  • Crystal Clear
  • Delicious Taste
  • Fresh and pure
  • Cleaner, clearer ice cubes
  • Exceptional coffee, tea, and juice
  • Use for cooking
  • House plants love it
  • Smells clean and fresh
  • Wash fruits and vegetables
  • Convenient faucet at the kitchen sink
  • More convenient than bottled water

Rent for $19.97 per month

5 Stage Reverse Osmosis (RO)

$25.00 Per Month 5-Stage RO Produces Better Than Bottled Quality Water

Free filter changes


Purchase a reverse osmosis system for as low as $550.00.

Call Water Pro: (805) 647-3365

Water Pro services the following cities: Ventura, Oxnard, Camarillo, Ojai, Oak View, Santa Paula, and Port Hueneme.