Instruction

23
ADJUSTABLE CHIMNEY LENGTH
The DuraTech Adjustable Length is used when
an exact length of chimney is needed and
standard lengths of chimney are not sufcient.
The Adjustable Length spans from 15”-22”
(Fig.34) and can be used between any other
DuraTech chimney sections (straight pipe
lengths, elbows, tees, etc.).
1. Determine the length needed for your
installation. There will be 1-1/4” lost to the joint
between the Adjustable piece and the next
section of chimney.
2. Remove insulation strips from male end
together with (4) sheet metal screws provided.
4. Twist lock the Adjustable Length into the
DuraTech chimney system. The Adjustable
Length is not intended to support chimney
either above or below. If the Adjustable Length
is installed in a system with more than 4-ft of
chimney above or below it, install a supporting
component (Elbow Strap, Tee Support, etc) im-
mediately above/below the Adjustable Length
to carry the additional weight of the chimney.
CHIMNEY MAINTENANCE
1. Creosote and Soot: When wood is burned
slowly, it produces tar and other organic vapors,
which combine with expelled moisture to produce
creosote. The creosote vapors condense in the
relatively cool chimney ue of a slow-burning re.
As a result, creosote residue accumulates on the
ue lining. When ignited, this creosote makes an
extremely hot re.
2. Access: Chimneys must be installed so that
access is provided for inspection and cleaning.
3. When to Clean: The chimney should be
inspected at least once every month during the
heating season to determine if creosote or soot
has built up. Check spark arrestor screens at
least every 2 to 4 weeks. If creosote or soot has
accumulated, it should be cleaned or replaced to
reduce the risk of chimney re.
4. How to Clean: Have your chimney cleaned
by a Certied Chimney Sweep if you have doubts
about your ability to clean it. Use a plastic,
wood, or steel brush. Do not use a brush that will
scratch the stainless steel liner of your chimney.
Scrub the spark arrestor with a wire brush. To
remove the Chimney Cap for cleaning unscrew
the four (4) screws that attach the cap’s support
legs to the cap base. The Tee Cleanout Cap can
be removed by turning counter-clockwise. Be
sure to replace Tee Cleanout Cap when you are
nished cleaning the chimney.
5. Coal: Warning: Coal with a high sulfur content
Table 4
Required
Total Length
Insulation
Removed
20” - 22”
0 strips
removed
18” - 20”
1 strip
removed
16” - 18”
2 strips
removed
14” - 16”
3 strips
removed
of pipe, as needed, depending on the length
required for your installation (Fig.33). Be very
careful on how much, if any, insulation is re-
moved from the male section. Refer to Table 4.
WARNING: The entire Adjustable Length
must be lled with insulation, without gaps.
Failure to ensure the insulation is continu-
ous can result in a re hazard.
3. Slide the two sections of the Adjustable
Length together, compressing the insulation
to achieve the desired length. Important: the
outer walls of the two sections must overlap a
min of 2” to ensure a proper connection. When
at the correct length, secure the two sections