1.0mm Single Wall Stainless Steel Flues (Grade 316)

1mm thick Stainless Steel is used to connect an appliance to either a chimney liner, stack or twin wall flue system. It must be installed to comply with the Document J or the Building Regulations in England and Wales, and part F of the Building Regulations in Scotland.

1mm Stainless Steel can also be used to reline an existing masonry chimney.
It is recommended that a vertical rise of 600mm should be allowed, immediately above the appliance before any change in direction. If bends are needed, then no part of a flue pipe should form an angle greater than 45° from the vertical, except where it may be necessary to use a very short horizontal section, not exceeding 150mm of flue to connect the flue pipe to a back outlet appliance. A maximum of 4 bends (2 offsets) is permitted.  Distances from combustible materials must be three times the diameter of the flue pipe. E.g. 150mm dm = 450mm clearance.