The Four Filtering Stages

Sediment Pre-Filter

The first stage of the 4-stage reverse osmosis water filtration system involves a sediment pre-filter. This pre-filter filters out the most basic of water contaminants, including dirt, dust, and other large, obvious debris.

This pre-filter is especially necessary for those who get their water from a well or a spring. Water that comes from these sources is almost guaranteed to be contaminated with at least small traces of dirt or sand.

Carbon Pre-Filter

The next step in a 4-stage reverse osmosis filtration system involves a carbon pre-filter. Eliminating several components from the water, including lead as well as tastes and odors that stem from the presence of chlorine, this stage serves to neutralize the water so that it tastes pure and free of chemicals.

Reverse Osmosis Membrane

The key stage in a 4-stage reverse osmosis water filtration system involves a reverse osmosis membrane. This membrane is capable of eliminating 95% of all dissolved solids from your water, softening it, and giving it as smooth a consistency as possible. After the water has passed through this membrane, it will be almost completely free of contaminants.

Post Carbon Filter

The last stage of a 4-stage reverse osmosis system makes use of a post-carbon filter. This filter is the last line of defense against any contaminants that might still be passing through your water after the first 3 steps of the process.

Known as the “polishing” filter, it remains any additional taste that may remain as a result of chlorine, lead, or iron. After this step has been completed, your water will be purified and ready for drinking.