Flues

Get your boiler installation sorted with our range of gas boiler flues. Designed to safely carry exhaust gases out of your property, these flue kits and components are essential for compliant, efficient boiler installs. We stock standard horizontal, vertical and telescopic options, along with boiler flue brackets to keep everything secure and properly supported. Whether you're working on a new gas boiler system or replacing an existing flue, we've got the gear to match most major boiler brands, including Ideal, Baxi, Worcester and more. 

Q: What is a gas boiler flue, and why is it important?

A: A gas boiler flue is a pipe that safely vents exhaust gases produced during combustion out of the property. It’s a legal requirement for all gas boilers, including combi boilers and system boilers. The flue ensures dangerous gases like carbon monoxide are safely expelled, making it a vital part of a heating system. Any boiler that burns gas or LPG will need a flue, it must be correctly installed and comply with Gas Safe regulations.

Q: What types of boiler flue components do you stock?

A: We stock a wide range of gas boiler flue parts, including:

• Flue extensions – for installations where the standard flue length isn’t sufficient

• Flue elbows and bends – to route flues around obstacles

• Flue adaptors and connectors – to join different flue components securely and join flues to boilers

• Flue brackets and support kits – to keep the flue pipe properly secured to a wall or structure

• Flue terminal guards – for protecting the external flue outlet

• Plume management kits – to redirect boiler plume away from windows or pathways

Q: What is a plume management kit?

A: A plume management kit redirects the visible steam (plume) that exits the boiler flue terminal, typically upwards or sideways. It’s useful where regulations require the plume to be discharged away from windows, vents or public walkways. 

Q: Can a gas boiler flue be extended?

A: Yes, flue extension kits can be used for longer or more complex installations. The total flue length will be limited by your boiler model, so always check the manufacturer’s instructions to stay within safe working distances.

Q: How much does it cost to replace a boiler flue?

A: Costs vary depending on the type and length of flue required, plus any accessories like elbows, brackets or plume kits. Expect flue kits to start around £70–£150, but always factor in labour costs for installation if you're not doing the work yourself.

Q: What is a FlueSnug and when is it used?

A: FlueSnug is a flue sealing product that helps installers comply with Building Regulations by ensuring airtight and heat-retaining seals around pipework, without the need for mortar. It's commonly used where flues exit through walls and is suitable for both retrofit and new installs.

Q: Do you deliver gas boiler flue parts?

A: Yes, we offer nationwide UK delivery on all boiler flue components, including full kits, brackets, elbows, and accessories. You can also check stock and order for collection from your local JT Atkinson branch.