Vaillant Unistor Indirect 250

Overview

The Vaillant Unistor Indirect 250 is designed to support dependable stored hot water performance in domestic heating systems. It can form part of a wider installation where the right boiler parts and compatible components are needed for long-term reliability. For heating engineers and homeowners comparing boiler accessories, this product helps complete a practical hot water setup.

The Vaillant uniSTOR 250L Unvented Indirect Cylinder is a premium stainless steel hot water storage solution designed for larger domestic properties. Perfect for sealed heating systems or open vent boilers, this high-capacity cylinder provides reliable and efficient hot water for homes with multiple bathrooms or high hot water demands.

Capacity and Performance

• Generous 250-litre capacity - ideal for larger households
• Low standby losses - only 1.4 kWh/24h, helping reduce energy consumption and running costs
• Energy-efficient design - rated Class B against L-profile, ensuring optimal efficiency for your home
• Unvented design - delivers high water pressure for improved flow at taps and showers

Dimensions and Installation

• Compact footprint for its capacity - W x H x D: 595 x 1535 x 595 mm
• Lightweight yet robust - empty weight 61 kg, full weight 301 kg
• Flexible installation options - suitable for retrofitting onto existing heating systems or as part of a new build

Durability and Peace of Mind

The uniSTOR cylinder is made from high-quality stainless steel, ensuring long-lasting performance and resistance to corrosion. Its robust design makes it suitable for demanding household conditions while maintaining efficiency over many years.

Why Choose Vaillant uniSTOR 250?

The uniSTOR 250L is perfect for homeowners upgrading from older vented cylinders or expanding their hot water storage. Its high-capacity, low-loss design delivers reliable hot water, reduces energy costs, and provides a strong, consistent flow for multiple outlets.

FAQs

Q: What is the capacity of the Vaillant uniSTOR 250?

The cylinder holds 250 litres of hot water, making it ideal for larger homes with multiple bathrooms.

Q: How energy-efficient is the uniSTOR 250?

It has low standby losses of 1.4 kWh/24h and is rated Class B against L-profile for energy efficiency.

Q: Can it be installed on existing heating systems?

Yes, the uniSTOR 250 is retrofit-friendly and can be installed on older sealed systems or as part of a new heating setup.

Check out our full range of plumbing supplies.

Browse more heating accessories available online.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

• Competitive prices on leading brands and quality products.
• Nationwide delivery across the UK
  
• A constantly expanding range of building and landscaping materials.
  
• Friendly, knowledgeable customer support.
  
• A trusted business backed by the JJ Roofing Supplies Group.
  

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.