Davant 21.5mm Black Solvent Overflow 90 Degree Elbow

The Davant 21.5mm Solvent Overflow 90° Elbow is a practical and essential fitting used to connect two overflow pipes at a right angle. Designed for use with 21.5mm solvent weld pipe systems, this elbow fitting helps you neatly and securely change the direction of pipework in cold water storage, cistern, or condensate systems. Ideal for installations where space is tight or the pipe needs to turn a corner, the 90° elbow provides a clean, efficient route for managing overflow water. Its solid plastic construction offers long-lasting durability, and the tight angle is perfect for creating compact layouts without compromising on flow performance. Available in both black and white, this elbow fitting allows you to match your existing pipework, whether you’re working indoors or on an external system. It’s particularly well suited to use in loft tanks, boiler overflows, or any setup where water needs to be safely diverted. Installation is straightforward—simply apply solvent weld cement to the pipe and the inside of the fitting, then push together for a permanent, watertight seal.

Frequently Asked Questions

When should I use a 90° elbow in an overflow system?

A 90° elbow is used when you need to make a sharp turn in your overflow pipework, such as going around a corner or connecting vertical and horizontal runs. It’s great for tight spaces and efficient routing.

Is this compatible with both black and white 21.5mm pipes?

Yes, the fitting is designed for 21.5mm solvent weld overflow pipe, regardless of colour. The black and white options are purely aesthetic to match the surrounding pipework.

Do I need any special tools to install this elbow?

No special tools are required. You’ll just need solvent cement, a clean pipe end, and a firm push to connect. Once bonded and set, the joint is strong and leak-proof.

Check out our full range of plumbing supplies.

Browse more overflow 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.