Gas terminal (GC1). This type of cowl must be used to terminate a liner installed on a gas fired appliances. Only use this when you do not want to remove the existing chimney pot.
Secure the flue liner to the inner tube of the flue bug, using stainless steel self tapping screws. Now secure the flue bug to the chimney pot using the three straps attached to the cowl. Jubilee strap must be purchased separately.