Heatrae Sadia - Kit 5 Including Expansion Vessel - 95970356

Heatrae Sadia Kit 5 is a safety-critical accessory kit designed for unvented water heaters. It must be installed on the cold mains supply line whenever local pipework cannot naturally absorb the thermal expansion of heated water. The complete pack includes a pre-charged expansion vessel to safely manage increased volume, alongside a non-return valve to prevent hot water backflow into the cold mains supply.