Vaillant uniSTOR PURE Heat Pump Cylinder 150L–300L Standard Size and Capacity:300L PURE Select the design flow temperature

Select the design flow temperature that allows the system to meet heat demand with correctly sized emitters for best seasonal efficiency

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Instantaneous Flow ReverserReverses flow direction instantly — loosens and mobilises stubborn deposits from both sides without disconnecting hoses

schedule heating around low-carbon or off-peak tariffs

OSO projects an average saving of around £200 per year for a typical household

Vaillant uniSTOR PURE Heat Pump Cylinder 150L–300L Standard Size and Capacity:300L PURE Select the design flow temperatureThe Vaillant uniSTOR PURE Heat Pump Cylinder (standard, non pre plumbed) is a high recovery, stainless steel unvented hot water cylinder that gives installers the freedom to connect and configure pipework to their own design. Available in 150, 175, 210, 250 and 300 litres, every standard uniSTOR PURE arrives complete with a tundish, three way motorised valve, unvented cylinder kit, expansion vessel and a " 28mm MI copper compression fitting. The 250 L