When should I use Sentinel SESI?

For domestic properties in hard water areas, Sentinel SESI is designed to protecting the hot water circuit and appliances. The Compliance Guide to Part L1 of the Building Regulations states that measures must be taken to minimise limescale build up in areas where water hardness exceeds 200ppm, so it is important to treat water using a recommended technology such as electrolytic devices to achieve this. Check your local water hardness levels at www.helpwithhardwater.co.uk.

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