How A Reverse Osmosis System Works | Plumbing & A/C Medic

How a Reverse Osmosis System Works

Reverse Osmosis systems are gaining popularity among homeowners across the country. This system filters water to reduce contaminants without adding chemicals. In the end, you end up with healthier, great-tasting water!

Are you wondering how does a reverse osmosis system works? In a nutshell, water enters the system it flows through three stages of treatment. Each step helps to reduce dissolved solids, impurities, and contaminants. Reverse osmosis systems contain three essential components: a pre-filter, a membrane, and a postfilter. Continue reading to learn more in-depth about each part.

Woman holding a glass of water


Larger particles, such as silt, rust, and scale, are removed by the pre-filter. This extends the life of your system and allows the semipermeable membrane to attack smaller particles.


At the center of the system, the reverse osmosis membrane allows hydrogen and oxygen to pass through its microscopic pores. Dissolved solids, too small to have been caught by the pre-filter, are now removed from the water and flushed down the drain.


Water flows from the membrane to a holding water tank where the water stays until the final filtration, before being dispensed. This ensures that only the freshest water is delivered to your home.

Water treatment is very relevant here in the Phoenix Valley, and there are many options. Choose the best one for your family and home. Call today to learn more about Reverse Osmosis and other drinking water systems we install.