× National Flues
We Won't Be Beaten On Price.
Free Delivery on Orders Over £100
100% 5 Star Reviews on Trustpilot
Free Flue Design Service Available
Need Help? 01670 206999 (8am-5pm)

 

450MM (18 Inch) Chimney Flue - Commercial Flue SWPro | National Flues

At National Flues, our 450mm (18 inch) chimney flue range includes a variety of products such as adaptors, boiler adaptors, pipes, elbows, tees, supports, terminals, and accessories. Our commercial flue SWPro collection offers reliable solutions for your flue system needs, designed for efficiency and durability.

Shop By Department

StovesPremium Stoves
FireplacesStunning Fireplaces
MI-FlexFlexible Liner
Chimney FlueChimney Flue
Connecting PipesConnecting Pipes
Fans Flashings CowlsFans Flashings Cowls
Installation PartsInstallation Parts
After Care PartsAfter Care Parts

Call our TWPro advisers on 01670 206 999 if you need any helping with your system design.

£96.99

3-450-001

Adaptor male-male - Ø 450

Adaptor male-male - Ø 450

OUT OF STOCK

£238.49

3-450-002

Increaser - Ø 450

Increaser - Ø 450

OUT OF STOCK

£161.49

3-450-003

Adaptor female-female - Ø 450

Adaptor female-female - Ø 450

OUT OF STOCK

£293.99

3-450-004

Non-concentric increaser - Ø 450

Non-concentric increaser - Ø 450

OUT OF STOCK

£967.99

3-450-008

Reducer - Ø 550

Reducer - Ø 550

OUT OF STOCK

£247.99

3-450-010

Pipe 1 m - Ø 450

Pipe 1 m - Ø 450

OUT OF STOCK

£178.99

3-450-011

Pipe 0,5 m - Ø 450

Pipe 0,5 m - Ø 450

OUT OF STOCK

£142.99

3-450-012

Pipe 0,25 m - Ø 450

Pipe 0,25 m - Ø 450

OUT OF STOCK

£183.49

3-450-014

Adjustable pipe 0,50 - 0,82 m - Ø 450

Adjustable pipe 0,50 - 0,82 m - Ø 450

OUT OF STOCK

£287.99

3-450-015

Adjustable pipe 0,35 - 0,50 m - Ø 450

Adjustable pipe 0,35 - 0,50 m - Ø 450

OUT OF STOCK

£129.99

3-450-018

Pipe 0,10 m - Ø 450

Pipe 0,10 m - Ø 450

OUT OF STOCK

£236.49

3-450-020

Inspection pipe 0,5 m - Ø 450

Inspection pipe 0,5 m - Ø 450

OUT OF STOCK

£167.99

3-450-025

Horizontal pipe with drain - Ø 450

Horizontal pipe with drain - Ø 450

OUT OF STOCK

£232.49

3-450-026

Vertical pipe with drain - Ø 450

Vertical pipe with drain - Ø 450

OUT OF STOCK

£198.99

3-450-027

Lid with horizontal drain - Ø 450

Lid with horizontal drain - Ø 450

OUT OF STOCK

£332.99

3-450-030

Elbow 90° - Ø 450

Elbow 90° - Ø 450

OUT OF STOCK

£234.99

3-450-031

Elbow 45° - Ø 450

Elbow 45° - Ø 450

OUT OF STOCK

£234.99

3-450-032

Elbow 30° - Ø 450

Elbow 30° - Ø 450

OUT OF STOCK

£234.99

3-450-033

Elbow 15° - Ø 450

Elbow 15° - Ø 450

OUT OF STOCK

£427.49

3-450-035

Tee 90° - Ø 450

Tee 90° - Ø 450

OUT OF STOCK

Your 450MM (18 INCH) Questions Answered

What materials are used in the construction of 450mm chimney flues? -

Our 450mm chimney flues are typically constructed from high-grade stainless steel, ensuring durability and resistance to corrosion.

Do I need professional installation for a 450mm chimney flue system? +

Are there any maintenance tips for 450mm chimney flues? +

Can I connect multiple appliances to a single 450mm chimney flue? +

Do you offer customization options for 450mm chimney flues? +

How can I determine the right size of 450mm chimney flue for my property? +

Are 450mm chimney flue systems suitable for both new installations and retrofits? +

... +

When it comes to commercial flues, the 450mm (18 inch) range is crucial for proper ventilation and safety. Our products, including reducers, increasers, adaptors, and more, are crafted with precision and compliance to meet industry standards. Whether you're setting up a new flue system or upgrading an existing one, our 450mm range provides the components you need to ensure optimal performance and longevity.
Why Buy 450MM (18 INCH) Products
The 450mm (18 inch) chimney flue products are commonly used in commercial settings such as restaurants, factories, and large buildings where a robust flue system is required. These flues help to efficiently channel exhaust gases from boilers, ovens, and other heating appliances out of the building, maintaining a safe and healthy indoor environment.

Trusted By Trade Professionals

Our 450MM (18 INCH) products and services are trusted by hundreds of professionals nationwide. We're committed to providing quality and reliability that meets the high standards of our customers.

Dedicated Support

Experience our unparalleled customer service and support when you buy 450MM (18 INCH) from National Flues. Our team is here to assist you every step of the way, ensuring your needs are met with expertise and care.

Multiple Payment Options- including Klarna, Clearpay, Mastercard, Visa and Paypal