Vaillant uniSTOR 300 Unvented Hot Water Cylinder

Vaillant uniSTOR 300 Unvented Hot Water Cylinder

The Vaillant uniSTOR 300 Unvented Hot Water Cylinder is designed for dependable stored hot water performance in domestic heating systems. It is a practical choice when specifying a boiler cylinder setup for a new installation or replacement project. For customers comparing a water cylinder, this product offers a reliable solution for everyday hot water demand.

The Vaillant uniSTOR 300 Unvented Hot Water Cylinder is a high-capacity hot water storage solution designed for sealed heating systems. It is an excellent choice for homeowners upgrading from a traditional open vented system with a cold water tank in the loft to a modern sealed system with a boiler and unvented cylinder. This upgrade removes the need for a loft tank, helping free up space while also significantly improving hot water pressure throughout the property. With a large 300 litre capacity, this cylinder is ideal for larger homes, properties with multiple bathrooms, or households with high hot water demand. Manufactured from high-grade duplex stainless steel, the cylinder is designed for long-term durability, corrosion resistance, and reliable performance. The uniSTOR cylinder is highly insulated using environmentally friendly materials to reduce heat loss and improve heating system efficiency. This helps reduce energy usage and can lower fuel bills over time. The cylinder also features a modern outer casing that is easy to clean and designed to fit neatly into airing cupboards or plant rooms.

Key Features

• 300 Litre Capacity
• Suitable for Sealed Heating Systems
• Ideal for Converting from Open Vented Systems
• High Grade Duplex Stainless Steel Cylinder
• Highly Insulated to Reduce Heat Loss
• Environmentally Friendly Insulation Materials
• Modern, Easy-to-Clean Outer Casing
• 2 Year Parts and Labour Guarantee
• 25 Year Cylinder Warranty

Key Specifications

• Product: Vaillant uniSTOR 300 Unvented Hot Water Cylinder
• GTIN: 4024074789001
• Product Type: Indirect Unvented Cylinder
• Model: Standard
• Gross Weight (Including Packaging): 69.1kg
• Net Weight: 62.4kg
• Height: 1745mm
• Width: 595mm
• Capacity: 300 Litres
• Warranty: 25 Years (Subject to Manufacturer's Terms & Conditions)

Why Choose an Unvented Cylinder?

Unvented hot water cylinders supply hot water at mains pressure, providing stronger showers and better flow rates from taps compared to traditional vented systems. They also remove the need for a cold water tank in the loft, freeing up space and simplifying the heating system. Modern cylinders like the Vaillant uniSTOR range are highly insulated to reduce heat loss and improve overall energy efficiency.

FAQs

What size property is a 300L hot water cylinder suitable for?

A 300 litre cylinder is typically suitable for large homes, properties with multiple bathrooms, or households with high hot water usage.

What is the benefit of an unvented cylinder?

An unvented cylinder provides hot water at mains pressure, giving stronger showers, better tap flow, and removing the need for a loft water tank.

How long is the warranty on a Vaillant uniSTOR cylinder?

Vaillant uniSTOR cylinders come with a 25 year cylinder warranty and a 2 year parts and labour guarantee, subject to manufacturer's terms and conditions.

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.