Power Flue Pipe Routes
Friday 17th December 2004
Power
flue
cookers
are
increasingly
being
installed
in
unusual
or
challenging
positions
, in
many
instances
requiring
the
flue
-pipe
to
be
run
under
ground
. Whilst
this
is
broadly
acceptable
, there
are
some
basic
guidelines
which
must
be
followed
. 1
. Keep
within
the
overall
maximum
length
, following
the
guidance
table
. e
.g
. -- 9
metres
+ 1
bend
, or
6
metres
+ 6
bends
2
. Avoid
creating
a
tight
'U
' trap
3
. Maximum
drop
below
cooker
of
300mm
4
. Where
necessary
, a
single
, downward
drop
must
be
made
adjacent
to
the
Aga
, not
part
way
along
the
route
.5
. The
pipe
must
be
wrapped
and
insulated
in
any
cold
area
, e
.g
. under
floor
or
in
an
unheated
utility
room
. Suitable
lengths
of
foil
-backed
insulation
(1200mm
long
) are
available
, as
used
on
the
30
-amp
Electric
Aga
, part
number
A1864
. The
flexible
pipe
sleeve
used
on
the
Rayburn
power
flue
system
is
an
alternative
, (R4956
) but
it
does
not
have
the
same
degree
of
insulating
properties
.
6
. Where
a
pipe
passes
through
a
solid
floor
, it
should
ideally
be
laid
in
a
purpose
duct
, with
detachable
cover
, to
enable
access
at
a
later
date
.7
. Condense
provision
. Experience
has
shown
that
a
properly
installed
flue
will
rarely
produce
condensation
in
harmful
amounts
, particularly
when
insulated
. If
the
flue
is
kept
level
the
water
-formation
is
minimal
and
unlikely
to
form
a
blockage
, If
a
low
spot
is
inevitable
, then
a
condense
trap
may
be
beneficial
. It
must
be
kept
easily
accessed
and
checked
on
a
service
visit
.8
. Some
thought
must
be
given
as
to
how
the
flue
could
be
cleaned
at
a
future
date
.On
short
runs
, the
flue
can
be
'rodded
' by
disconnecting
at
the
fan
unit
and
using
a
flexible
rod/brush
, likewise
access
from
outside
the
property
through
the
terminal
.On
complicated
flue
routes
with
various
changes
of
direction
, particularly
below
floor
, or
where
there
is
rigid
pipe
-work
, then
special
access
points
might
be
needed
.For
such
occasions
we
are
currently
looking
to
offer
a
Tee
piece
with
blanking
cap
as
a
new
optional
flue
component
. Obviously
it
will
need
to
be
carefully
sited
with
both
access
and
final
appearance
in
mind
. More
details
will
be
available
in
due
course
.Often
the
pipework
cannot
be
safely
'sprung
' apart
for
access
. An
easy
way
of
providing
disconnection
points
in
an
otherwise
solid
run
of
pipe
is
to
use
two
flange
fittings
as
shown
below
. This
component
is
normally
used
as
the
connection
onto
the
fan
unit
and
may
be
ordered
using
part
number
A2989
'Fan
outlet
adaptor
' A2631
'Flue
pipe
sealing
rings
' A
gasket
will
also
required
, part
number
A3513
'Fan
Outlet
gasket
'
