This model water softener is a water pressure-controlled water softener and does not require a power connection. Fitted with two resin cylinders with alternating action, and provides soft water 24/7. Also fitted with a separated salt tank (external) so ideal when space is at a premium. The softener and the salt tank should be installed no more than 7 metres apart when connected with a 10mm (3/8") salt hose. The softener can be installed in damp areas, crawl spaces and in meter wells. The salt tank can optionally be placed above ground with the advantage that it can be easily refilled. It's also ultra-quiet, economical in terms of water and salt consumption and will flush when necessary.