The eSoft Pro Domestic Water Softener is the most reliable system available on the market today.  The Clack control valve has been used throughout the world for over 40 years and has been found to be trouble-free and user friendly.  The eSoft Pro comes in a range of sizes suitable for a single tap to a large family home the size of the softener is based on the Resin volume, these are the 5 litre, 8 litre, 10 litre, 20 litre & 30 litre models. The model of domestic water softener you require will depend on the size of the property and the water usage.