This water softener is a grey plastic container designed to make ‘hard household water’ to ‘soft household water’ It comes as a single unit and is suitable for use in the home to improve the quality of the water. Made from durable plastic, it is a reliable and effective solution for improving the water. This was used in my home for approx 9 Years and it has been serviced every year since its installation. It cost originally with the Machine and Installation over £800.00p. It is still in Working Order but surplus to requirements.