How Does a 5-Stage RO Filtration System Work? Complete Guide

The 5-stage RO filtration system is the most classic water purification solution for home drinking water. It follows a clear filtering process to turn raw tap water into clean, safe drinking water.

The first three stages are the common 3-in-1 pre-filtration set: PP cotton, UDF and CTO, responsible for removing sediment, chlorine and impurities. The fourth stage is the RO reverse osmosis membrane, which filters heavy metals, bacteria, viruses and tiny contaminants down to 0.0001 micron. The fifth stage is post activated carbon, improving water taste and making water fresher.

5-stage RO systems are widely sold in Middle East, Central Asia, Africa and European markets. They fit standard household water purifiers and commercial drinking equipment.

As a professional manufacturer, we supply complete 5-stage filtration system kits, spare filter cartridges and OEM customized service for global buyers. Bulk order and custom specification are available.