The Vaillant uniSTOR cylinder range includes two large capacity commercial cylinders and a complete range of accessories. The 500 and 800 litre models have impressive coil sizes, of 4.7m2 and 7m2 which are manufactured using high grade stainless steel, and pass the highest Vaillant standards and quality control requirements.

In addition, a comprehensive range of accessories are available which includes a choice of unvented cylinder kits, compatible expansion vessels, and a 7.5kW immersion (800 litre only). This provides the installer and specifier with maximum flexibility during design and installation.

Both cylinders can also be easily cascaded to generate higher requirements for hot water. We can advise on your project for additional support and peace of mind.

uniSTOR Large Capacity Key Features & Benefits

•  Single guarantee for all components – Complete peace of mind from one manufacturer
• Unvented cylinder kit, expansion vessel and sensor available as an accessory – Complete system solution offering whilst meeting all building regulations
• Large diameter, smooth bore coil technology – Provides quiet operation, reduces build-up of scale and aids in long term efficiency through automatic descaling
• Global Warming Potential less than five and ozone depletion of zero – Designed around environmental requirements
• In-built lifting eye – Easy to move over any terrain
• Secondary return – Accommodates complex and larger dwellings
• Factory fitted T&P valve – Ensures safety requirements to meet regulations
• Large 7.5kW single phase immersion available – Emergency backup in case of main heat source failure (800 litre only)
• Inspection port included – Meets requirement of many commercial specifications (800 litre only)

About uniSTOR Heat Pump Cylinders

The uniSTOR heat pump cylinder range has been designed to work in harmony with Vaillant heat pumps, to provide highly efficient heating and hot water systems. uniSTOR’s large surface area and smooth coil design maximises heat transfer, to ensure connected Vailllant heat pumps run at their optimum efficiency, to reduce running costs and increase hot water performance.

Ranging from 150 up to 800 litres, uniSTOR heat pump cylinders are available in both pre-plumbed (150-300 litres) and standard options (150-300 litres), giving you even more flexibility. In addition to this, the 250 and 300 litre cylinders have an increased coil size making them compatible with a wider range of ground source heat pump systems.

uniSTOR cylinders also have a Global Warming Potential of less than 5 thanks to thermal injected insulation, as well as a 100% recyclable stainless steel tank with an ultra-hard-wearing outer shell, to deliver a highly efficient and sustainable heating system.

uniSTOR pre-plumbed cylinder:

• 150 litre
• 200 litre
• 250 litre
• 300 litre

uniSTOR slimline pre-plumbed cylinder:

• 150 litre

uniSTOR standard cylinder:

• 150 litre
• 200 litre
• 250 litre
• 300 litre

uniSTOR large capacity cylinder:

• 500 litre
• 800 litre