The individual elements of pre-filtration 

The DWA pre-filtration concept includes specific devices for different demands which are upstream of the Reverse Osmosis Systems. 

The configuration of the pre-filtration depends on the local raw water quality. Requirements for effective pre-filtration to archive drinking water quality for a safe and long-lasting operation of the Reverse Osmosis System are water analysis, measurement of the blocking index as well as the knowledge of the exact water hardness. 

Changes in raw water quality – also of temporary nature – affect the dimensioning of necessary pre-filtration and requires continuous monitoring. 

Only an individual pre-filtration concept protects the Reverse Osmosis and provides maximum operational safety and maximum cost effectiveness.