5" SFL Twin Wall Black

SFL Sflue is fully compatible with Docherty's Excelsior Twin Wall flue ranges

Sflue is a top end product and utilises a unique eight-barb quick lock jointing system to secure each joint. The components are secured by locating the barbs with a twist of each section. A locking band is then used at each joint (provided). Note, due to the insulation between the internal and external aspects of the twin wall flue pipe, the external diameter is 2" greater than the internal diameter.