7
Connecting Flue Pipe
Within a system (C Connecting Flue Pipe) there should be no more than 4 changes of
direction of maximum 45˚. 90˚ Factory made bends or tees within the system may be treated
as being equal to two 45˚ bends (as per Document J of the Building Regulations issued October
2010).
INSPECTION
On solid fuel applications to conform to Building Regulations, provisions should be made to
enable a chimney to be inspected and cleaned.
An inspection pipe, inspection elbow or a 90° or 135° Tee with tee cap can form a suitable
inspection point (unless cleaning/inspection can be done through the appliance). To aid cleaning,
sufficient distance should be left between changes of direction to permit the safe passage of
cleaning brushes within the system. This is particularly important on solid fuel applications. It is
recommended that chimneys serving solid fuel appliances be swept as frequently as necessary,
but at least twice a year.
