Designed with a space-saving internal expansion vessel. Has clearly labelled cylinder connections for quicker and easier installation. With 3bar working pressure and 50mm of high efficiency insulation. Supplied with unvented kit. Duplex Stainless Steel Tank 2 Year Manufacturer's Guarantee (T&Cs Apply) Low Heat Loss & Fast Recovery High Value Insulation Suitable for Most Domestic Systems Overheat Cut-Out Protection Suitable for Indirect Boiler Systems Duplex Stainless Steel Tank 2 Year Manufacturer's Guarantee (T&Cs Apply) Low Heat Loss & Fast Recovery High Value Insulation Suitable for Most Domestic Systems Overheat Cut-Out Protection Suitable for Indirect Boiler Systems