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7.8.4 Clamping the flue system (twin and concentric)
Maximum distance between brackets
IMPORTANT
► These regulations are typical for both
concentric and twin flue systems.
► The flue system must be secured to a solid
structure.
► The flue system should have a continuous
fall back to the boiler (1.5° to 3°).
► Only use Intergas approved brackets.
► Every bend or change of direction must
be secured by using the approved bracket
(excluding the appliance bend).
If the length of the pipes before and aer
the first elbow, are no more than 250mm,
a support bracket must be used and
positioned on the elbow! (See illustration D)
► Every extension must be secured per metre
with a bracket.
This bracket must be clamped around the
pipe ensuring free movement for expansion
and contraction purposes.
► Make sure bracket is locked correctly
depending on its location i.e.
position "A" = pipe location
position "B" = elbow location.
A = bracket on pipe
B = bracket on elbow
max. 1000 mm
max. 2000 mm
max. 1000 mm
Orientation
Flue system
Horizontal/
non-vertical
Vertical
Safe-PP 1000 mm 2000 mm
Concentric 1000 mm 2000 mm
► Distribute the length between brackets evenly.
► Each flue system has to contain at least 1 bracket.
► The distance between the boiler and the first bracket must not be more than 500 mm.
A B C