4" Rain Cowl

Our Price: £42.45 Incl. VAT: £50.94

Availability: In stock

Product Code: TWRC04

4" Rain Cap T/W



 Twin wall Warranty

4" Rain Cowl used to fit to the top of the flue system and is secured by way of a locking band.

Made of 316 Stainless Steel. 

Locking Band NOT included


(Please note: We base all of our twin wall system on the internal diameter measurement, this item is not suitable for gas).


Same day dispatch if ordered before 2pm.


Twin Wall Rain Cowl


View Our Installation Guides:

Bungalow Internal Installation

Bungalow Installation guide

External House Installations

External Installation

Straight Internal Installation

Ventilation Installations


Our twin wall insulated is a simple push-fit  joint system. Build your system by placing each piece on top of the previous and push together to make the join. This is the simplest system to construct on the market today.


Building Regulations

Download Building Regulations Document J (effective October 2010) below

Download Document J

(Right click link, then select "save file as..")