Sentinel’s KalGUARD limescale controllers have been chosen across the property portfolio of a prestigious independent boarding school in Dorset.

Meeting the needs of resident students and staff for a seamless supply of hot water is of paramount importance to the school, yet the area’s hard mains water (at 260ppm) can compromise this requirement. In the absence of adequate limescale control, hard water will give rise to limescale accumulation in water heaters, pipework and appliances, a phenomenon which can lead to low water flow rates, increased energy consumption and asset breakdown, to name but a few problems.

The reason for KalGUARD’s superior performance is due to its unique powered electrolytic scale inhibitor technology, which unlike magnetic devices (and other types, such as electronic), is based upon a methodology that is recommended by the UK Building Services Compliance Guide to Part L for the control of scale.

It works by utilising a pure zinc sacrificial anode to permanently change calcium carbonate crystals (limescale) into soft, non-deposit forming aragonite, and has been independently tested and verified. As a point of note, the product is WRAS-approved, meaning water is perfectly safe to drink.

KalGUARD is non-LSI dependent and sized according to demand, so just one unit is needed to treat an entire system when installed on the rising main before the tank and booster sets. Furthermore, the technology doesn’t waste water or require consumables (such as salt) and is extremely low maintenance.