Waterside is a British manufacturer of water softeners - their range is available in either meter controlled or time clock models. They are compact enough to fit inside most kitchen units thus providing simple access for salt filling.
Waterside is now a brand of Culligan a company that has led the world in water treatment technology supplying safe quality water for drinking, cooking, cleaning, bathing and manufacturing. The Waterside brand is an extension of that commitment to water and technology following on from their sixty years already in water.
Grant and Stone plumbing and bathroom showrooms also supply salt cubes suitable for water softeners.