Car valeting services have the option to use either onboard purification systems, or to purify raw water from a mains source. When pulling water directly from source to fill storage tanks or use directly onto vehicles, a deionisation resin stage that is targeted towards hard water areas is utilised to withstand high TDS levels. This is due to the lack of filtration before the treatment process.
Typically, some pre filtration is used before the resin filled pressure vessel to remove particles and organics from the feed water. The effect of this is a prolonged service life for the resin, as it does not have to deal with as high a concentration of contaminants.
