A boiler flue ensures that the exhaust gases produced by a boiler are carried outside the home and released into the atmosphere, so that home safety isn't jeopardised. You may need to extend a boiler's flue system for a variety of reasons, such as the need to accommodate a new house extension or to move a gas boiler flue to a more effective location.

If you are a Gas Safe registered engineer in need of a boiler flue extension, our range has you covered. You will need to find an extension from the same brand as the boiler, which is why we stock items from a wide variety of brands.

Browse our boiler flue extensions today and don't forget that you'll benefit from free UK delivery if your order total is £50 or more.

We offer boiler flue extensions with varying diameters for a broad set of purposes, and you'll find products from established boiler brands such as Worcester Bosch, Grant and Vokera. 

Our range includes boiler extension flues measuring 60mm, 100mm, 125mm and 1000mm in diameter, to cover as many situations as possible. The length that you will need will be determined by how far you need to extend the boiler flue system to safely emit gases without risking the health of neighbours or passers-by.

We have a few boiler flue extension kits available, too, for a selection of Worcester Bosch and Ideal Boilers systems. Our kits represent a convenient solution if you're looking for all the parts that you need in one place to help you to extend a particular boiler system's flue.

The price of your outside boiler flue extension will vary depending on several factors, such as the make and model and the length that you require. You'll find products priced between £19 and £136 (each price includes VAT).

Don't forget that, when you spend at least £50 with us, you'll benefit from free UK delivery. If you'd rather pick up the items yourself at a convenient time, it's no hassle to use our Click & Collect service.

When you shop with City Plumbing, you can relax in the knowledge that we have 40 years of industry experience behind us. Our core values inform everything that we do, and customer satisfaction is of the utmost importance to us.

If you'd like to read more about our track record of success, you can find us on Trustpilot, where we've got thousands of five-star reviews.

If you are looking for a flue extension or extension kit for a gas boiler, you have come to the right place. You can either place an order online or come and see our stock for yourself at one of our showrooms. We have over 350 nationwide branches and, whichever you visit, our friendly team of experts will be on hand to offer advice.

And if you've got any queries about your order or just need some general advice about our products, simply get in touch with us today and we'll do our best to help you.