Total dissolved solids (TDS) refers to any compounds left in the water after normal treatment and filtration. Particles are filtered through a fine filter, usually to 0.45 microns, to remove the suspended solids. What remains in the water after filtration are typically charged atoms or molecules called ions. Usually these are ions such as calcium, sodium, potassium and magnesium, although some organic salts may be present as well. Although water softeners are a common way to remove some TDS, reverse osmosis is a much more effective method of removing TDS from drinking water.
Select and purchase the desired reverse osmosis system.
Turn off the water that feeds the area where the reverse osmosis system will be used.
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Install the reverse osmosis system per the instructions for the specific system you have purchased.
Cycle the reverse osmosis system and make sure that it is functioning properly.
As reverse osmosis systems have become more common the prices have come down and they are readily available in most home improvement stores. While they cost more initially, they are more effective at removing total dissolved solids than cheaper solutions, such as pitchers with a water filter built in.