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125MM (5 INCH) Fireplace & Flue Fixings and Accessories | National Flues

At National Flues, we offer a comprehensive selection of fixings, terminals, and accessories for 125MM (5 INCH) fireplace and flue installations. Our products are designed to ensure safe and efficient flue systems, providing everything you need for a complete setup. With a focus on quality and durability, our 125MM (5 INCH) range is suitable for various installations, delivering reliable performance and peace of mind.
At National Flues, we offer a comprehensive selection of fixings, terminals, and accessories for 125MM (5 INCH) fireplace and flue installations. Our products are designed to ensure safe and efficient flue systems, providing everything you need for a complete setup. With a focus on quality and durability, our 125MM (5 INCH) range is suitable for various installations, delivering reliable performance and peace of mind.


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The best selling flue liner in the UK. Suitable for gas, oil, and approved solid fuels. Call our advisers on 01670 206 999 if you need any help choosing.

£1.88 £209.99
Showing 20 of 24 items
Nose Cone - Ø 125

Nose Cone - Ø 125

20-125-NC
£5.99 (including VAT)
In stock
Triplelock - GC1 Gas Terminal - Ø 125

Triplelock - GC1 Gas Terminal - Ø 125

34-125-C
£7.99 (including VAT)
In stock
Triplelock - Debris Plate (Spring Fix) - Ø 125

Triplelock - Debris Plate (Spring Fix) - Ø 125

34-125-DP
£27.99 (including VAT)
In stock
Triplelock - Flue Bug - Ø 125

Triplelock - Flue Bug - Ø 125

34-125-FB
£25.99 (including VAT)
In stock
Triplelock - Oil Cowl, Chinamans Hat - Ø 125

Triplelock - Oil Cowl, Chinamans Hat - Ø 125

34-125-O
£23.99 (including VAT)
In stock
Triplelock - Clamp Plate (2 pc.) - Ø 125

Triplelock - Clamp Plate (2 pc.) - Ø 125

34-125-P
£4.99 (including VAT)
In stock
Triplelock - Installer Pack B (Clamp, GC1) - Ø 125

Triplelock - Installer Pack B (Clamp, GC1) - Ø 125

34-125-PB
£11.99 (including VAT)
In stock
Triplelock - Installer Pack C (Clamp, GC1, Nose Cone) - Ø 125

Triplelock - Installer Pack C (Clamp, GC1, Nose Cone) - Ø 125

34-125-PC
£16.99 (including VAT)
In stock
Triplelock - Pot Hanging Cowl, Terracotta - Ø 125

Triplelock - Pot Hanging Cowl, Terracotta - Ø 125

34-125-PHCMT
£42.99 (including VAT)
In stock
125mm (5 inch) Standard Flue Box  Flue Box

125mm (5 inch) Standard Flue Box Flue Box

8-SFB
£161.99 (including VAT)
In stock
125mm (5 inch) Sheffield Pattern   Flue Box

125mm (5 inch) Sheffield Pattern Flue Box

8-SHEF
£108.99 (including VAT)
In stock
125mm (5 inch) VISA Flue Gas Collector   Flue Box

125mm (5 inch) VISA Flue Gas Collector Flue Box

8-VISA-SF
£76.99 (including VAT)
In stock
125mm (5 inch) VMF Flue Box SS  Flue Box

125mm (5 inch) VMF Flue Box SS Flue Box

8-VMFS
£80.99 (including VAT)
In stock
Debris Collar with Jubilee Connector - Ø 125

Debris Collar with Jubilee Connector - Ø 125

94-COLLAR-J-125
£14.99 (including VAT)
In stock
Register Plate (F) - 900x495, no access hole - Ø 125 & 150

Register Plate (F) - 900x495, no access hole - Ø 125 & 150

94-REG-F
£30.99 (including VAT)
In stock
Register Plate (G) - 900x495, 2 access hole - Ø 125 & 150

Register Plate (G) - 900x495, 2 access hole - Ø 125 & 150

94-REG-G
£56.99 (including VAT)
In stock
Register Plate (H) - 900x600, no access holes

Register Plate (H) - 900x600, no access holes

94-REG-H
£51.99 (including VAT)
In stock
Triplelock - Flue Adaptor - Ø 125

Triplelock - Flue Adaptor - Ø 125

34-125-A
£17.99 (including VAT)
Out of stock
Triplelock - Adaptor, Screw-Fix - Ø 125

Triplelock - Adaptor, Screw-Fix - Ø 125

34-125-ASF
£16.99 (including VAT)
Out of stock
Triplelock - Cast Aluminium Terminal - Ø 125

Triplelock - Cast Aluminium Terminal - Ø 125

34-125-CT
£52.99 (including VAT)
Out of stock
Your 125MM (5 INCH) Questions Answered

What is the purpose of a Debris Plate in a flue system? -

A Debris Plate helps prevent debris and foreign objects from entering the flue, reducing the risk of blockages and maintaining proper ventilation.

How do I know which Adaptor I need for my flue installation? +

Can the Clamp Plate be used for securing different flue components? +

What are the benefits of using a Pot Hanging Cowl? +

Is the Cast Aluminium Terminal suitable for all types of flue installations? +

Why choose a GC1 Gas Terminal for a flue system? +

Do I need a Nose Cone for my flue installation? +

When it comes to 125MM (5 INCH) fireplace and flue installations, having the right fixings and accessories is crucial for a successful setup. Our range includes Triplelock Debris Plate, Adaptor, Flue Adaptor, Clamp Plate, Pot Hanging Cowl, Flue Bug, Cast Aluminium Terminal, Oil Cowl, GC1 Gas Terminal, Nose Cone, Plastic Nose Cone, Installer Pack B, and Installer Pack C. These products are expertly crafted to meet industry standards and ensure a secure and efficient flue system.
Why Buy 125MM (5 INCH) Products
Our 125MM (5 INCH) fixings, terminals, and accessories are ideal for both residential and commercial fireplace installations. Whether you are setting up a new fireplace or upgrading an existing flue system, our products provide the necessary components for a safe and reliable operation. From chimney pots to installation packs, our range covers all the essential elements required for a well-functioning fireplace and flue system.

Trusted By Trade Professionals

Our 125MM (5 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 125MM (5 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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