What Is Reverse Osmosis Water Filtration?

What Is Reverse Osmosis Water Filtration?

If you’ve been planning to replace your old water filtration system with one that offers top-quality drinking water for your home and office, reverse osmosis water filtration is probably the best solution available.

In layman terms, in reverse osmosis, water is sent through a semi-permeable membrane that filters out all the contaminants and dangerous microorganisms from the water. The residual is drained out, and fresh, clean, filtered water is accumulated in the storage tank.

How Does RO Remove Contaminants?

Reverse osmosis is a relatively straightforward process of water filtration. It works by forcing tap water to pass through a medicated semi-permeable membrane that filters out all the soluble inorganic compounds—such as salt—and other impurities from the water, making it drinkable. Other pollutants that reverse osmosis removes from the water are fluoride, pesticides, detergents, chlorine, nitrates, lead, and sulfates.

What Are the Important Components in a Reverse Osmosis Water Filtration Unit?


Water Supply Valve

This valve is located on the exterior side of the filter. It is adjoined to the water pipe that supplies water to the RO filtration unit.


Before entering the membrane, the water from the supply pipe first goes through the pre-filters. The purpose of these filters is to keep the membrane from clogging on harmful compounds such as carbon (chlorine), sand, dirt, and other debris.

RO Membrane

ro membrane

This semi-permeable membrane is the main component of the RO system. Its purpose is to clean all the chemicals and contaminants that are hazardous to human health.

Storage Tank

The filtered water from the membrane is held in this tank. A typical holding tank is fifteen inches tall and twelve inches wide. It can store as much as four gallons of water, which is kept under pressure with the help of a tank bladder.

Post Filters

Before leaving the filtration system, the water from the storage tank passes through a post filter. It further polishes the water and ensures that it’s free of any odor and bad taste.


Typically, RO filtration systems come with their faucets that are mounted above or near the kitchen’s sink.

Drainage Pipe

This pipe is attached to the bottom of the filter and runs all the way to the kitchen drain. It flushes out all the contaminants, carbons, and other sediments that were filtered out from the water by the membrane.

Why Should You Consider Investing in a Reverse Osmosis Water Purification Unit?


Millions of Americans have shifted to reverse osmosis water filtration for their residential and commercial needs because:

  • The RO filtered water tastes better than water filtered from traditional units
  • RO consumes less energy and safer
  • It’s more convenient because of full automation
  • RO water filtration unit is priced at budget-friendly rates
  • It eliminates the cost of bottled water services and helps save money
  • Fewer, simpler, and removable components make it easier to clean the system
  • Adequately maintained RO systems could last up to ten to fifteen years.

As experts in the plumbing industry, we strongly suggest that you replace your traditional water filtration system with an advanced reverse osmosis purification unit. We carry only the best quality in-home water filtration systems for alkaline water and also services for water softener Reno that are designed to offer optimum efficiency and reliability.

Get in touch with our experts at Johnson Plumbing to learn more about our services.

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