Vaillant's uniSTOR heat pump cylinder range is designed to work in harmony with Vaillant heat pumps, providing highly efficient heating and hot water systems. Featuring state-of-the-art insulation and a 100% recyclable stainless steel shell, uniSTOR heat pump cylinders offer a robust and sustainable system solution. The pre-plumbed cylinder range comes with fitted components for quicker installation. All Vaillant hot water cylinders are manufactured in line with standards maintained by the Hot Water Association. The uniSTOR cylinder has a large surface area and smooth coil design to maximize heat transfer, ensuring connected Vaillant heat pumps run at optimum efficiency, reducing running costs and increasing hot water performance. The pre-plumbed slimline version has an increased coil size, making it compatible with a wider range of ground source heat pump systems. It features thermal injected insulation with a Global Warming Potential of less than 5 and a 100% recyclable stainless steel tank with an ultra-hard-wearing outer shell.