5
Connecting Flue Pipe
APPLIANCE/CHIMNEY CONNECTION
When a single wall connecting flue pipe is used to connect an appliance to a Twin Wall Insulated
System Chimney, the lower end of the chimney section must extend a minimum of 425mm
below the ceiling. When connecting the appliance to the connecting flue pipe, the joint between
the the connecting flue pipe and the appliance outlet must be securely caulked and sealed with
non asbestos rope (or suitable alternative) and fire cement.
CONNECTING FLUE PIPE DIAMETER
Connecting Flue Pipe Diameter size should be as recommended by the appliance manufacturer.
Where there is a requirement for a flue diameter smaller than the appliance spigot, then the
operational requirements of the appliance and the configuration of the flue must satisfy the flue
sizing requirements of EN13384-1.
DISTANCE TO COMBUSTIBLES
In accordance with building regulations, it is essential that the correct distance to combustible
material is maintained.On solid fuel applications, where there is a risk of soot fire, this distance
is 3 x ØInt of the pipe, i.e for Ø125mm the distance is 375mm and for Ø150mm the distance is
450mm to combustibles on both painted and non painted variants.
CONNECTING FLUE PIPE ROUTE
Single wall connecting flue pipes should only be used to connect appliances to a Chimney. They
should not pass through any roof space, partition, internal wall or floor, except to pass directly
into a chimney through a wall of the chimney.
