Free Delivery


Free shipping on orders over £125 Net.

*(excludes Scottish Highlands, Northern Ireland, Eire, and Uk Islands)



All Our Products Are Competitively Priced
Without the Compromise On Quality.

Safe & Secure


Sagepay & Paypal is a safer, faster, more secure way to pay online.

4" Rain Cap Matt Black

In stock
  • 4" Twin Wall Cowl
  • 316 Stainless Steel Construction 
  • Push Fit Sstem
  • For Use When Burning, wood, gas, oil, Low Sulphur Coal
  • This Product has a 25 year Manufacturers Guarantee

Upgrade Your Fireplace with the 4" Rain Cap Twin Wall Insulated Flue System

Enhance Performance and Safety

Ensure optimal performance and safety for your fireplace with our 4" Rain Cap Twin Wall Insulated Flue System. Crafted with precision, this flue system is designed to meet and exceed your expectations.

Key Benefits:

  • Enhanced Safety: Protect your home from rainwater and debris, preventing potential damage to your fireplace.
  • Optimal Ventilation: The twin wall insulation ensures efficient ventilation, allowing your fireplace to function at its best.
  • Easy Installation: Designed for user-friendly installation, saving you time and effort.
  • Durable Construction: Built to withstand the elements, ensuring longevity and reliability.

Upgrade Your Fireplace Experience

Elevate your fireplace experience with our 4" Rain Cap Twin Wall Insulated Flue System. Enjoy the warmth and ambiance without worrying about external factors affecting your fireplace's performance.

Invest in Quality

Don't compromise when it comes to your fireplace. Invest in the best with our 4" Rain Cap Twin Wall Insulated Flue System and enjoy a safer, more efficient, and longer-lasting fireplace.

More Information
Component Type Cowls

twin wall rain cap

Designation: EN1856-1 T450 N1 D V3- L50040 G60
Installation Guide: Our twin wall insulated flue is a simple push fit joint system. To create and maintain a continuous length, the twin wall pieces push together and with the aid of a locking band (provided with each length) secure the connection between each piece. The push fit system remains the easiest method of installation to date.
Recommended Fuels: Wood, Oil, Gas, Low Sulpher Coal
Building Regulations :

We recommend that all installations are carried out by a qualified chimney installer.

additional information on installation and requirements can be found below.

 pdf documentDownload Document J Regulations

Material : Stainless Steel
Vat no. 173389871- Company No. 08618240 - Registered Name: Chimney Supplies Ltd t/a NCS - Copyright © 2023-present National Chimney Supplies