Possible to create offsets in Straight flue runs by using our 45° elbows and extensions Maximum total flue length = 12 metres (Deduct 1 metre for each additional 45° elbow used) Supplied as a complete kit Unique connection system ensures easy assembly 150mm flue pipe diameter for boilers up to 26kW 180mm flue diameter for boilers from 26-70kW Extensions available in 225mm, 450mm or 950mm fixed lengths and a 275-450mm adjustable length Optional 1 metre extended flue terminal Pitched or flat roof flashings in aluminium or lead available