Scalemaster Water Softeners Better For The Enviroment: The advaced technology of the Scalemaster Softline range makes your new water softener one of the most efficient and enviromentally friendly water softeners on the market. For water up to a total hardness of 300ppm all Scalemaster Softline water softeners use less than 4% water for the regeneration process which meets the Minimum Performance Level Requirements for the Water Efficiency for units to be considered Carbon Neutral as defined in the Code for Sustainable Homes published by the Building Research Establishment. 1 Year Full Warranty (5 years parts) on 100 & 200 models. 2 Year Full Warranty on 150 & 450 models.