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High-Quality 400mm (16 Inch) Chimney Flues & Accessories - National Flues

Discover the finest selection of 400mm (16 inch) chimney flues at National Flues. Our commercial flues, SWPro range, and accessories like adaptors, elbows, and terminals ensure efficient venting for your heating system. With a focus on durability and performance, our products guarantee reliable chimney solutions to meet your needs.

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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.

£116.49

3-400-036

Lid - Ø 400

Lid - Ø 400

OUT OF STOCK

£165.99

3-400-037

Lid with drain - Ø 400

Lid with drain - Ø 400

OUT OF STOCK

£287.49

3-400-038

Elbow 87° - Ø 400

Elbow 87° - Ø 400

OUT OF STOCK

£437.99

3-400-039

Tee 93° - Ø 400

Tee 93° - Ø 400

OUT OF STOCK

£484.49

3-400-060

Adjustable base support from 50 to 80 mm - Ø 400

Adjustable base support from 50 to 80 mm - Ø 400

OUT OF STOCK

£350.99

3-400-061

Consolate plate - Ø 400

Consolate plate - Ø 400

OUT OF STOCK

£278.99

3-400-090

Cap - Ø 400

Cap - Ø 400

OUT OF STOCK

£322.99

3-400-091

Antiwind cowl - Ø 400

Antiwind cowl - Ø 400

OUT OF STOCK

£166.99

3-400-093

Cone - Ø 400

Cone - Ø 400

OUT OF STOCK

£316.49

3-400-102

Increaser 2 diameters - Ø 400

Increaser 2 diameters - Ø 400

OUT OF STOCK

£433.49

3-400-104

Non-concentric increaser 2 diameters - Ø 400

Non-concentric increaser 2 diameters - Ø 400

OUT OF STOCK

£528.99

3-400-108

Reducer 2 diameters - Ø 500

Reducer 2 diameters - Ø 500

OUT OF STOCK

£443.49

3-400-135

Inspection Tee - Ø 400

Inspection Tee - Ø 400

OUT OF STOCK

£390.49

3-400-136

Ø 100 inspection tee 0,5 m - Ø 400

Ø 100 inspection tee 0,5 m - Ø 400

OUT OF STOCK

£540.99

3-400-202

Increaser 3 diameters - Ø 400

Increaser 3 diameters - Ø 400

OUT OF STOCK

£550.49

3-400-204

Non-concentric increaser 3 diameters - Ø 400

Non-concentric increaser 3 diameters - Ø 400

OUT OF STOCK

£1,037.99

3-400-208

Reducer 3 diameters - Ø 600

Reducer 3 diameters - Ø 600

OUT OF STOCK

£176.99

3-400-BA-348

Boiler adaptor - Ø 400

Boiler adaptor - Ø 400

OUT OF STOCK

£176.99

3-400-BA-353

Boiler adaptor - Ø 400

Boiler adaptor - Ø 400

OUT OF STOCK

£100.49

3-400-BA-398

Boiler adaptor - Ø 400

Boiler adaptor - Ø 400

OUT OF STOCK

Your 400MM (16 INCH) Questions Answered

What materials are the 400mm (16 inch) chimney flues made of? -

Our chimney flues are typically made of high-grade stainless steel, ensuring durability and corrosion resistance.

Can I use a 400mm (16 inch) chimney flue for a boiler installation? +

Do I need special tools to install a 400mm (16 inch) chimney flue? +

Are the 400mm (16 inch) chimney flues compatible with different chimney types? +

How do I ensure the proper sizing of a 400mm (16 inch) chimney flue for my heating system? +

What maintenance is required for a 400mm (16 inch) chimney flue? +

Can I customize the length and configuration of a 400mm (16 inch) chimney flue? +

When it comes to selecting a chimney flue for your commercial space or residential property, quality matters. At National Flues, our 400mm (16 inch) chimney flues are engineered to deliver exceptional performance and durability. Whether you need adaptors, pipes, reducers, or tees, our wide range of products ensures you find the perfect fit for your heating system. Our commitment to excellence and customer satisfaction sets us apart in the industry, making us the go-to choice for professionals and homeowners alike.
Why Buy 400MM (16 INCH) Products
The 400mm (16 inch) chimney flues from National Flues are designed to cater to a variety of applications, including industrial buildings, multi-story residences, and commercial establishments. These high-quality flues ensure proper ventilation, improve air quality, and enhance the overall efficiency of your heating system. Whether you are upgrading an existing chimney or installing a new one, our products provide the durability and performance you need to complete the job with confidence.

Trusted By Trade Professionals

Our 400MM (16 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 400MM (16 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.

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