Northline Express Simpson Dura-Vent Type B Gas Vent User manual

Type B Gas Vent
C o m p l e t e V e n t i n g S o l u t i o n s
Installation Instructions
Type B GasVent System for
use with natural gas or liquid
propane category I and draft
hood equipped appliances and
appliances listed to use Type B
Gas Vent.
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A MAJOR CAUSE OF VENT
RELATED FIRES IS FAILURE
TO MAINTAIN REQUIRED
CLEARANCES (AIR
SPACES) TO COMBUSTIBLE
MATERIALS. IT IS OF THE
UTMOST IMPORTANCE
THAT TYPE B GAS VENT
BE INSTALLED ONLY IN
ACCORDANCE WITH THESE
INSTRUCTIONS.
NOTE:
Read through all of these instructions before
beginning your installation. Failure to install
as described in this instruction will void the
manufacturer’s warranty, and may have an
effect on your homeowner’s insurance and UL
listing status. Keep these instructions for future
reference.
Dear Customer, Installer, or End User:
I welcome any comments regarding matters
pertaining to our Simpson Dura-Vent products.
I welcome any ideas, input or complaints and
I’ll make sure that someone responds directly
back to you.
Send your emails to:
[email protected]
If you are searching for tech support or product
information, please phone us at 800-835-4429.
Or email us at:
[email protected]
Sincerely,
Steve Eberhard, President and CEO
Simpson Dura-Vent Co., Inc.
MH6357
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CONTENTS
General Information, Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Steps for Typical Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Bucket Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .11
Combination Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Adjustable Elbows, Male and FemaleAdapters. . . . . . . . . . . . . . . . . . .. . . .12
ReliningMasonryChimneys for usewithGasAppliances. .... .... .... ..13
Type B Gas Vent
Type B Gas Vent
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Read through all of these instructions before
beginning your installation. Failure to install
as described in these instructions will void the
manufacturer’s warranty and may have an
effect on your homeowner’s insurance and
ULlisting status. Keep these instructions for
future reference.
GENERAL INFORMATION
Type B Gas Vents are for venting listed Natural
Gas or Liquid Propane Category I appliances
only. The appliances listed below typically
(but not always) use Type B vent systems.
Boilers
Furnaces
Water Heaters
Unit Heaters
Room Heaters
Duct Furnaces
Floor Furnaces
Decorative GasAppliances
Simpson Dura-Vent Type B Vent Systems
may be used on other gas-burning appliances,
provided the manufacturer of the appliance
states in their installation instructions that
Type B-vent is acceptable. Do not use Type B
Vents for Category II, III, or IV gas appliances.
Type B Vent shall not be used to vent ue
products from incinerators, combination
gas/oil appliances, oil-red, or wood-
burning appliances. If there is a question
about the use of Type B Vents, contact the
appliance manufacturer or Simpson Dura-
Vent’s Engineering Department for further
information.
PLANNING
1.Appliances. Carefully review the appliance
manufacturer’s installation instructions for
positioning the unit, any special venting or
connector requirements, and verify that it is
a Category I appliance or an appliance that
requires the use of Type B gas vent.
2. Placement. The placement of the vent
and ttings must be in accordance with Local
Codes, as well as accepted venting practices.
If more than one appliance is to be connected
to one venting system, the common vent must
be correctly sized. It is a good idea to make
a sketch of the proposed installation, labelling
the components you will need. Adjustable Pipe
Lengths are available to make up odd lengths.
Minimize the number of turns and lateral
runs, as the National Fuel Gas Code places
limitations on these. A45° turn is preferable to
a 90° turn. The appliance reference material
should be consulted at this time, as well as any
LocalAuthority having jurisdiction. In most
localities, building permits are required for any
new appliances, or modications to existing
venting systems.
3. Figures 1, 2, & 3 show examples of some
typical residential installations.
4. Clearance to Combustibles. A1-inch
clearance (air space) to combustible
materials must be maintained, when
using Simpson Dura-Vent Round B-Vent,
regardless of the pipe diameter.
5. CombustionAir. Refer to appliance
installation instructions and local building
codes to ensure compliance with required
volume of combustion air for each appliance
installed .
6. Slope. If the venting system contains
lateral (horizontal) components, they shall be
positioned so they have an upwards slope
away from the appliance of not less than
1/4-inch rise per foot of run. (Horizontal
vent installed in attics, unconditioned area, or
between oors have further restrictions, please
consult your local building codes for specic
limitations.)
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Figure 2
7. TerminationArea. Examine the area where
the vent system will terminate. The height of
the termination above the roof is determined
by the roof pitch, and also it’s proximity to
adjacent walls or obstructions. Consult Table
2 for proper termination height requirements.
Vent pipe with 3”-12” diameter must terminate
at least 2 feet higher than an adjacent wall
or obstruction, if it is within 8 feet. Vent pipe
with 14” or larger diameter must terminate
at least 2 feet higher than an adjacent wall or
obstruction, if it is within 10 feet.
8. Connector Rise. Plan a minimum of one
foot vertical connector rise coming out of each
appliance.
TOTAL
VENT
HEIGHT
WATER HEATER
WITH DRAFT HOOD
LATERAL
FURNACE
CONNECTOR RISE
CEILING SUPPORT /
FIRESTOP
90° ADJUSTABLE
ELBOW
INCREASER
B-VENT
PIPE
B-VENT TEE
WATER HEATER
CONNECTOR RISE
FAN ASSISTED
FURNACE
Figure 1
FLASHING
DURACAP TOP
HIGH WIND CAP
SEE TABLE 2
1 INCH MINIMUM
CLEARANCE
(ALL SIDES)
B-VENT
1 INCH MINIMUM
CLEARANCE
(ALL SIDES)
FIRESTOP
SPACER
DOTTED LINES
SHOWPOSSIBLE
OFFSET IN ATTIC
SPACE
ENCLOSURE
CEILING SUPPORT
/FIRESTOP
VENT C ONNECTS
TO APPLIANCE
STORM
COLLAR
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TABLE 1
PIPE SIZE STOCK
NUMBER
OF CEILING
SUPPORT
FRAMED INSIDE
DIMENSIONS (X & Y)
FIG.4
3 INCH 1440 6"x6"
4 INCH 1441 7"x7"
5 INCH 1442 8"x8"
6 INCH 1443 9"x9"
7 INCH 1444 10"x10"
8 INCH 1445 11"x11"
10 INCH 1446 13"x13"
12 INCH 1447 15"x15"
TOTAL
VENT
HEIGHT
1 INCH MINIMUM
CLEARANCE
(ALLSIDES)
WATER HEATER
CONNECTOR RISE
B-VENT USED AS
CONNECTOR
45º / 60º
ADJUSTABLE
ELBOW
FURNACE
CONNECTOR
RISE
FAN
ASSISTED
FURNACE LATERAL
DURA-CONNECT
FLEXIBLE SINGLE
WALLCONNECTOR WATER HEATER
WITH DRAFT HOOD
B-VENT WYE
Figure 3
Figure 4
EXISTING
JOINTS
EXISTING
SHEET
ROCK
FRAMING MEMBERS
REQUIRED FOR
SUPPORT
Figure 5
Figure 6
CLAMPAND
HARDWARE
HANGER
STRAPS
CEILING
SUPPORT
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STEPS FOR TYPICAL
INSTALLATION
1. Location. Building Code requires the
appliance(s) to be located as close to the vent
as possible. After consulting the local codes,
appliance installation instructions and any
other applicable reference material determine
the optimum location for the appliance(s).
2. Penetration Point. Locate and mark the
center of the penetration point through the
ceiling or the wall. Refer to Step 3 or 4, as
appropriate.
3. Ceiling Support. For a ceiling supported
system, install the Square Firestop/Support as
shown in Figures 6, 7, and 8. The Firestop
Support must be framed in and the dimensions
are shown in Table 1 and shown in Figure 4.
Firestop Supports are currently manufactured
for pipe sizes of 3” through 12” only. Larger
sizes may be locally fabricated from sheet
metal, provided that the mandatory 1-inch
clearance is maintained, the pipe is adequately
supported, and the installation is acceptable
to LocalAuthorities. In multistory buildings,
a Firestop/Spacer must be provided at every
oor /ceiling level other than the rst oor
which requires a support.
4. Wall Thimble. For a through-the-wall
system, install the Wall Thimble, as shown in
Figure 5. The WallThimble is designed to
accommodate walls up to 6 inches thick. If
you have thicker walls, a sleeve extension
should be fabricated and attached to the
existing sleeve . Do not ll the air space
between the B-vent Pipe Section and the Wall
Thimble with insulation, although an RTV-type
sealant may be applied around the ange and
nail heads if desired.
5.PipeAssembly. Sections of Simpson
Dura-Vent round pipe are joined together by
lining up the female end of the locking lug
with the male end slot, pushing them together,
Figure 7
HANGER
STRAPS
Figure 8
CLAMP
PIPE COLLAR
(OPTIONAL)
B-VENT PIPE
SECTION
NAILS
(4 REQ)
and turning clockwise to twist lock. Refer to
Figure 9. Sheet metal screws are not needed
for 3” through 8” diameter pipe. However,
if desired, use 1/4-inch long sheet metal
screws for 3” through 8” diameter pipe. Never
penetrate the inner liner with screws. For 10”
through 16” diameter pipe, Simpson Dura-Vent
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recommends usingaminimumof (4)3/8”sheet
metal screwsperjoint,and aminimumof(6)
3/8” sheetmetalscrewsare requiredperjointfor
18” andlargerdiameters. Each Pipe Sectionis
labelled, andanarrowshows thedirectionofthe
exhaust ow. For ceiling supported installations,
place aPipeSection,or assembledPipe
Sections, throughtheholein theSquareFirestop
Support, andtightentheClamp. The Clamp will
rest insidetheCeilingSupport, andpreventthe
Pipe Sectionsfromdroppingdown. The Pipe
Section(s) shouldprotrudeaminimum ofone
inch belowtheceiling. AnoptionalPipeCollar is
availablefor decorative purposes.
6. Connectors. OnlySimpsonDura-Vent
connectors shouldbeusedbetween the
appliances andtheventingsystem. Some
appliances requireTypeB-Ventas acomplete
dedicated system from the ue collar of the
appliance totheterminationof thevent to the
outside atmosphere. Simpson Dura-Vent’s
listed exible, single-wall corrugated aluminum
connector, called“Dura-Connect” canbeusedin
many applicationswhenaB-Vent connectoris
notrequired.
7. Elbows. WhenElbowsare required,strapthe
Pipe Sectionsand/orElbowsin placeusingWall
Straps.Important: the offset mustbesupported
with Wall Strapstoprevent theweightfrom
stressingthe elbows, as shown in Figure 10.
8. Tees and Wyes.Tees and Wyes are
used to combine connectors from 2 or more
appliances into a common vent as shown in
Figures 2 and 3. ATee should be used in
a through-the-wall application, (Figure 11),
as they have a removable Tee Cap (available
as a separate item) attached to the bottom.
This Tee Cap may be removed in order to
inspect the system, or to clean out debris or
collected condensate from the common vent.
Wall Straps should be used to support the
vertical pipe as needed to provide a secure
Figure 9
STEP 1
STEP 2 STEP 3
Figure 10
1 INCH
MINIMUM
CLEARANCE TO
COMBUSTIBLES
ATALLPOINTS
WALLSTRAP
WALLSTRAPS
ELBOW GORES
CEILING SUPPORT
EXISTING
STRUCTURE
45º / 60º
ELBOW
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installation. Wall Straps every four feet are
recommended.
9. Enclosures. Any portion of the vent which
passes through an occupied area must be
enclosed, to prevent accidental damage to
the system, as well as burns. Figure 1 shows
a system which passes through an occupied
second oor. Simpson Dura-Vent does not
recommend installation of B-Vent Pipe on
the outside wall of a building, particularly in
cold climates. If it is necessary to do this,
enclose the outside portion of the system in
a chase, as shown in Figure 11. Consult the
LocalAuthority prior to construction. Note
that the enclosure requires an access door for
inspection and maintenance purposes.
10. Terminations. Where the Pipe Sections
pass through the roof, a hole must be cut to
provide a minimum clearance (air space) of
1 inch between the Pipe and construction
materials. Straight lengths of pipe are run up
above the roof. (see table 2)ARoof Flashing
is placed down over the pipe, and adjusted
so it ts tightly against the roof, with the Pipe
Section held in a position maintaining the 1
inch minimum clearance from combustibles.
The Flashing is then nailed to the roof. The
roong material (shingles, asphalt paper, etc.)
should overlap the top edge (uphill side) of the
Flashing. Anon-hardening sealant should be
used around the edges of the ashing base
where it meets the roof, as shown in Figure
12. Non-hardening sealant is placed around
the joint between the Flashing and the vertical
Pipe Section and the Storm Collar is then
placed over this joint, to make a watertight
seal. Add sufcient Pipe Sections to attain the
height specied in Table 2 (see next page).
To connect the Top to the pipe, hold Top by its
collar, slide collar over locking lugs of pipe, and
twist-lock clockwise. Tops of diameters greater
than 16 inches do not twist-lock, but are afxed
Figure 12
HIGH
WIND
CAP
STORM
COLLAR
FLASHING
1 INCH
MINIMUM
CLEARANCE
TOPSARE
INTERCHANGEABLE
DURACAP
TOP
SEALANT
SEE
TABLE 2
1 INCH
MINIMUM
CLEARANCE
Figure 11
1 INCH
MINIMUM
CLEARANCE
(ALLSIDES)
TEE CAP
TEE
REMOVABLE
ACESS
DOOR/PANEL
FOR CLEANING
AND
INSPECTION
FRAMED
ENCLOSURE
GASAPPLIANCE
WALL
THIMBLE
WALLSTRAPS
WALLSTRAP
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BUCKET SUPPORT
1. Description. The Bucket Support (shown
in Figure 13) is for properly supporting the
B-vent between 16 or 24-inch O.C. joists
or rafters, or for providing a transition tting
between Dura-Connect Single Wall Connector
and the B-vent Pipe Sections. A maximum of
20 feet of Type B Gas Vent may be supported.
Note that the Bucket Support must be installed
prior to the sheetrock.
2.Assembly. After you have determined
where the B-vent should be located, assemble
the Bucket Support and Brackets. Nail the
assembly to the bottom side of the joist
material as shown in Figure 14. After the
Support Bucket is in place, scribe and cut out
a hole in the sheet rock 1/8” larger than the
diameter of the Bucket, and nail into place.
Run the Pipe Sections through the hole in the
Bucket Support, connect the Dura-Connect
Single Wall Connector, and attach the Clamp
so that it rests inside the Bucket, and will
support the Pipe. Adjust the Pipe to the
desired height and tighten the Clamp. This
will provide a complete engineered support
system.
Figure 13
Figure 14
B-VENT
BUCKET
SUPPORT
RAFTER 16 OR
24 INCHES O.C.
CEILING
SINGLE-WALL
CONNECTOR
(DURA-CONNECT)
CONTINUATION
OF B-VENT
NAIL
HERE
TABLE 2
gas vent systems using vent caps listed by underwriters labroratories may
terminate in accordance with this vent termination table
ROOF PITCH MINIMUM HEIGHT
FEET METERS
FLATTO 7/12 1 0.3
OVER 7/12 TO 8/12 1.5 0.46
OVER 8/12 TO 9/12 2 0.61
OVER 9/12 TO 10/12 2.5 0.76
OVER 10/12 TO 11/12 3.25 0.99
OVER 11/12 TO 12/12 4 1.22
OVER 12/12 TO 14/12 5 1.52
OVER 14/12 TO 16/12 6 1.83
OVER 16/12 TO 18/12 7 2.13
OVER 18/12 TO 20/12 7.5 2.29
OVER 20/12 TO 21/12 8 2.44
with sheet metal screws.
11. Inspection. This completes the installation
steps. Conduct a nal inspection to insure that
all joints are secure, the system is properly
supported, and is mechanically sound.
Especially verify that the one-inch clearance to
combustibles requirement has been met, and
that adequate combustion air will be furnished
to the appliance.
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Figure 15 Figure 16
Figure 17
Figure 18
COMBINATION CAP
1. Description. The Combination Cap,
provides an easily installed, safe and efcient
B-Vent Top and Flashing, as one lightweight
unit. The two basic components and the
assembled unit are shown in Figure 15. The
Combination Cap is designed to accommodate
roof pitches from at to 6/12, and is available
for 3” through 6” diameter B-Vent pipe.
2. Location. Locate the point in the underside
of the roof where the system is to penetrate,
using a plumb bob or level.
3. Hole. Remove sufcient roong material
to cut a hole in the roof which will allow a
minimum of 1 inch air space between the
B-Vent and combustible roong materials.
4. Flashing. Position the Flashing so the hole
is directly over the end of the pipe, as shown in
Figure 16. Run the top edge of the Flashing
under the roof covering, nail as required, and
seal with a non-hardening sealant, as shown in
Figure 17. Seal all nail heads.
5. Height. Add sufcient Pipe Sections of
B-Vent until the system terminates 1-1/2” to 3”
above the collar of the Flashing as shown in
Figure 16.
6. Top Cone. Slip the Top Cone over the
Flashing, so the vertical straps on the Flashing
coincide with the slots at the base of the
Cone. Slip the straps up through the slots as
shown in Figure 18. Adjust theTop Cone to
a generally vertical position. Holding the Top
Cone in position, bend the straps down as
shown.
7. This completes the installation. Conduct
a nal inspection of the job to insure proper
joints, correct procedures, sealed nail heads,
etc.
RUN TABS ON
FLASHING UP THRU
RAISED SLOTS ON
CONE
ADN THEN
FOLD THEM
OVER TO HOLD
CONE TO
FLASHING
1 1/2 to 3
INCHES
1 INCH
MINIMUM
APPLY SEALANT
ALONG TOP,
LEFT,AND RIGHT
EDGES,AND ON
NAILHEADS
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Figure 19
Figure 20
Figure 21
ADJUSTABLE ELBOWS
1. Purpose. This section furnishes
supplemental information concerning
Adjustable Elbows, both 90° and 45°/60°.
2. Connections. In addition to twist locking
the elbows, the connection may be further
secured by using sheet metal screws at the
joint where the male and female parts overlap,
provided that the screws do not penetrate the
inner liner as shown in Figure 19. One screw
per joint is normally sufcient. Use #8 Pan
Head sheet metal screws which are no longer
than 1/4 inch. Liberal use of Wall Straps for
additional support is recommended. Do not
allow the weight of the offsetting pipe to bear
down on lower elbow.
3. 90° Elbows. Figure 20. The installer
should apply pressure to the section at the
points indicated by the arrows. This will
prevent the adjacent sections of the elbow
from turning, as the next pipe or tting is twist-
locked on. This is important, because once
these sections start rotating, the elbow does
no longer have a 90° angle.
4. 45° Offsets with 90° Elbows. Figure 21
shows a 90°Adjustable Elbow being utilized
to accomplish a 45° offset. This Elbow is
completely adjustable from 0° to 90°. Please
note that the centers of the upper sections
tend to displace by a slight amount, as they
are rotated. Again, screws (not longer than
1/4”) may be used to secure the joint. Wall
Straps should also be utilized to enhance the
stability of the vent system.
MALE AND FEMALE ADAPTERS
1. Description. The male and female
adaptors enable an installer to connect
Simpson Dura-Vent B-vent components to an
existing Type B gas vent system manufactured
by the following companies:American Metals
SHEET
METAL
SCREW 1/4
INCH LONG
DRILL 1/8 INCH DIAMETER
HOLE. DO NOT PENETRATE
INNER LINER
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Products, Household Mfg, Hart & Cooley Mfg,
Metal Fab, Inc, White Metal Products,Air Jet,
Mitchell Metal Products.
2. Connecting into Existing Competitors
System. To connect into an existing
competitors gas venting system from below,
or from the appliance side, connect a Female
Adaptor as shown in Figure 22, insuring
that the inner liner of the adaptor is outside
the inner liner of the existing pipe. Push the
adaptor as far up as it will go, and tighten the
locking bolt until the connection is snug.
3. Extending an Existing Competitors
System. To continue an existing competitors
system up towards the termination using Dura-
Vent Type B Gas Vent, connect a Male Adaptor
to the last section of the system, as shown in
Figure 23, insuring that the inner liner of the
Adaptor ts smoothly inside the Pipe or tting
below it. Push theAdaptor down as far as it
will go, and tighten the locking bolt until the
connection is snug.
RELINING MASONRY CHIMNEYS
FOR USE WITH GAS
APPLIANCES
1. Description. Amasonry chimney should be
relined with B-Vent when venting a Category I
gas appliance, such as a gas replace insert
or freestanding gas stove, or to improve the
venting and reduce condensation of existing
gas appliances which are currently venting
into the masonry chimney. These instructions
encompass two general congurations: (1)
A gas replace situated inside an existing
masonry replace (Figure 24) or (2), a
freestanding gas appliance venting into an
existing masonry chimney. (Figure 30)
2. Masonry Inspection. Have the masonry
chimney inspected by a qualied chimney
sweep or installer to determine it’s structural
condition. Clean and repair as necessary.
Figure 22 Figure 23
3. Gas Fireplace. Carefully read the
appliance manufacturer’s installation
instructions. Use the recommended vent size.
Do not reduce the vent size below that of the
ue exit on the appliance. Do not common
vent gas replaces.
EXISTING
SYSTEM
B-VENT
ADAPTER
(FEMALE)
EXISTING
SYSTEM
B-VENT
ADAPTER
(MALE)
Figure 24
GAS RELINING
ASSEMBLY
FLEX PIPE
B-VENT PIPE
SECTION
EXISTING
MASONRY
FIREPLACE
AND CHIMNEY
GAS
FIREPLACE
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(a) Measurements. Measure and record the
dimension as shown on Figure 25 (Height “A”).
You will need an additional 12” of vent above
the masonry chimney. It is a good idea to allow
for a little extra height in your measurements.
(b) Pipe and Fitting Requirements. The
bottom 5 foot section of vent will be Flex Pipe
(used to get around the smoke shelf, and to
connect to the appliance). The remainder will
be rigid B-Vent Pipe Sections. For each pipe
joint, subtract 1-1/2 inches.
(c). Connector. Read the appliance
manufacturer’s instructions for connecting
the Flex Pipe to the appliance. In most cases,
a Draft Hood Connector will be required as
shown in Figure 26. If you are not sure, contact
the appliance manufacturer for clarication.
Place the appliance out in front of the replace
area, as shown in Figure 27, and install the
Draft Hood Connector, or other device in
accordance with the appliance instructions.
The Flex Pipe Coupling may be able to attach
directly to the appliance.
(d). Flex PipeAssembly. Assemble rst Rigid
Pipe Section to the Flex Pipe, insuring that the
“UP” arrows are in fact, pointing up. Push the
sections together and twist to lock. Screws are
not required, however if you desire to use them,
use #8 sheet metal screws 1/4-inch long, being
careful not to penetrate the inner liner. Repeat
this process for the remainder of the Pipe
Sections, and lower the assembly down the
chimney. Lower it below it’s normal position as
shown in Figure 28.
(e). Position and Connect Fireplace. Push
the gas replace towards the rebox, and
connect the Flex Pipe female coupling to the
appliance, or to the appropriate connector as
specied by the appliance manufacturer. If
insufcient space is available between the top
of the appliance, and the replace opening,
an access opening in the opposite side of the
Figure 25
Figure 26
A
B
C
12 INCHES
DRAFT HOOD
CONNECTOR
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Figure 27
Figure 28
Figure 29
masonry chimney may be necessary. Position
the gas appliance on it’s nal location, again
complying with the manufacturer’s instructions
in regards to location. Install any shields or
covers at this time.
(f). Adjust Height. Go to the top of the chimney
and pull the vent system up to its desired height.
In most cases, this will be 12 inches above
the masonry surface. Make a mark on the
Pipe Section even with the top of the masonry
surface. If the top of the pipe is near a steep
roof (more than 7/12 pitch) ,use the height as
stated in Table 2.
(g). TerminationAssembly. Trim the Base
Plate of the TerminationAssembly to cover the
masonry opening. Refer to Figures 28 and
29. Slip the Base down over the protruding
Pipe Section. Use masonry anchors and non-
hardening sealant to secure the Base to the
masonry.
(h). Clamp. Pull the Pipe up through the Base
to the mark, which you previously made. Slip
the Clamp down to the mark, and tighten it
securely to the Pipe. The Clamp will then
support the entire venting system. Slip the
Storm Collar down over the Pipe Section, and
seal the joint with a non-hardening sealant.
(i). Top. Install the Top, as shown in Figure 28.
MASONRY
ANCHORS BASE OF GAS
RELINING
TERMINATION
ASSEMBLY
TRIMMEDAND
SHAPED TO FIT
MASONRYAND
FLUE TILE
APPLY ONON-
HARDENING
SEALANTAROUND
THESE SURFACES
APPLY NON-
HARDENING
SEALANT GAS RELINING
TERMINATION
ASSEMBLY
TRIM BASE
TO FIT
MASONRY
NON-
HARDENING
SEALANT
MASONRY
ANCHORS
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16
Figure 30
Figure 31
in it’s desired position, and mark the center
of the hole where the lateral Pipe Section is
to pierce the masonry chimney. Insure the
manufacturer’s requirements are complied
with, particularly in regards to distances from
combustible surfaces. Refer to Figure 30.
(b). Hole in Masonry. Move the appliance
aside, and break out the masonry, forming
a hole large enough for the Pipe Section to
get through, and also large enough to reach
through and hold the Tee, while connecting
the horizontal Pipe Section. An alternate
procedure is to make the hole only large
enough for the Pipe Section to pass through,
and construct an access gate on the other side
of the masonry chimney. Do not mortar to the
pipe.
(c). Tee. ATee is installed at the bottom end
of the assembled vertical Pipe Sections, as
shown in Figure 30. The Tee has a removable
Tee Cap at the bottom, for cleaning and
condensate removal. If the conguration of the
building permits it, a clean-out access gate is
recommended.
(d). Vertical Pipe Sections. Run the
assembled vertical Pipe Sections (with the Tee
attached to the bottom), down the chimney,
until the horizontal branch of the Tee is
opposite the hole in the masonry.
(e). Adjust Height. Hold the assembled Pipe
Sections in this position, and make a mark
even with the top surface of the masonry
chimney. The vertical Pipe Sections should
protrude 12 inches (in most cases) above this
mark. If the top of the pipe will be near a steep
roof (more than 7/12 pitch), use the height as
stated in Table 2.
(f).Termination Assembly. Trim the Base
Plate of the TerminationAssembly to cover the
masonry opening. Refer to Figures 28 and
29. Slip the Base down over the protruding
Pipe Section. If necessary, use masonry
This concludes the procedures for installing a
gas replace in an existing masonry replace.
Conduct a nal inspection of the system,
and verify that the manufacturer’s installation
instructions have been totally complied with.
2. Gas Appliance Venting Into the Side Wall
of a Masonry Chimney.
(a).Locate Appliance. Set the appliance
CERAMIC FIBER
INSULATION
GAS RELINING
TERMINATION
ASSEMBLY
TRIM COLLAR
DRAFT HOOD
CONNECTOR (IF
REQUIRED)
GAS
APPLIANCE
TEES
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17
anchors and non-hardening sealant to secure
the Base to the masonry or bend base to
secure.
(g). Clamp. Pull the Pipe up through the Base
to the mark, which you made previously. Slip
the Clamp down to the mark, and tighten it
securely to the Pipe. The Clamp will then
support the entire venting system. Slip the
Storm Collar down over the Pipe Section,
and seal the joint with a non-hardening high
temperature RTV.
(h). Horizontal Pipe Section(s). Run the
horizontal Pipe Section(s) through the hole
in the masonry, and connect it rmly to the
Tee, either by reaching through the hole, and
holding the Tee while twisting the Pipe Section,
or by holding the Tee through the access door
while someone twist-locks the Pipe Section to
it. Use anAdjustable Pipe Length as needed
to obtain a specic location for the appliance.
Make a mark on the horizontal Pipe Section
ush with the vertical face of the masonry, for
referencing the vertical position. Slip a Pipe
Collar over the horizontal Pipe Section and
install the remaining ttings as shown in Figure
30. Aminimum of 12 inches of connector rise
is required.
(i). Insulation. Pull the Pipe Collar towards
the 90° Elbow. Fill in the gap between the
masonry and the horizontal Pipe Section with
ceramic ber insulation, as shown in Figure
31. The lling may be faced off with grout, if
desired. Push the Pipe Collar back ush with
the masonry. Make any nal adjustments
on theAdjustable Length Pipe (if used), and
tighten the clamping bolts.
TROUBLESHOOTING
1. Purpose. This section is intended as a
general maintenance and troubleshooting
guide, and as such, cannot encompass all
congurations or vent designs. For problems
encountered which are beyond the scope of
this sheet, contact your Simpson Dura-Vent
Dealer, Distributor, or Simpson Dura-Vent’s
Engineering Department. It is imperative that
the one-inch clearance (air space) dened in
these instructions be maintained. In most
cases, a one-inch minimum clearance must
be maintained to combustibles. The only
exceptions are 4-inch, 5-inch and 6-inch
Oval B-vent which are installed within stud
walls. Oval B-vent and BW Vent are the
subject of a separate installation instruction,
and are not discussed here. In these cases,
the clearances are established by the listed
Firestop Spacers described in the instructions
for Oval B-Vent.
2.Appliance. Read the appliance installation
instructions carefully, insuring that the
prescribed clearances are met, and that it is a
Category I appliance.
3. Spillage. Spillage from an appliance draft
hood may cause condensation on windows, or
odors that the occupant may notice. Spillage
may be caused by an incorrectly sized vent
system, blockage of the vent system, or a
downdraft in the vent. Other causes are:
excessive lateral runs, too many elbows,
improper pitch to lateral runs (1/4 inch per foot
of run is correct), fans or ventilation systems
in the same general area as the gas appliance,
or wind conditions at the vent cap.
4. Blockage. Check the system for blockage
by removing the cap, and looking down into
the vent with a ashlight. Check for bird nests,
debris, rodents, insects, or other obstructions.
If nothing is found, inspect the entire system
for physical damage.
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18
5. Downdraft. Downdrafts are generally
caused by the system’s termination being too
close to an adjacent wall, parapet, or other
structure. If the cap is within eight feet of such
an obstruction, it must also be at least two
feet above it. Also insure that the top is at the
height prescribed for your roof pitch in Table
2. Inadequate combustion air is also a major
cause of downdraft problems. Appliances like
clothes dryers or other exhausting appliances
in the same utility room can cause downdraft
problems.
6. Condensate/Corrosion. Continuous
condensate can cause corrosion (rusting) of
vents, tops, appliance draft hoods, and other
components of the system, as well as the
inside of the appliance. This situation can be
extremely dangerous, and corrective action
must be taken immediately. Common causes
of corrosion are listed below: If in doubt call a
professional to inspect the vent.
(a) If the vent system is located in an area
where spray cans or solvents are used
extensively, (laundry areas, or paint shops,
for example), the halogenated compounds
get into the combustion air. When they are
burned, they form compounds that cause
corrosion. The corrective action in this case, is
to isolate the appliance, and get the air supply
from outside, or an uncontaminated area.
(b) Condensate may be caused by incorrect
sizing of the vent system. Follow the
procedures in the various sizing publications
to obtain the correct sizes for connectors
and vents. Other causes are: excessive
lateral runs, too many elbows, cold attics and
crawl spaces, and large areas of the exterior
portions of the venting system exposed to cold
weather. As a general rule, laterals should
be held to a minimum, and be no longer than
75% of the vertical height of the system.
Condensate may initially appear as beads on
the outside of the connector or vent.
7. Construction. Laterals, offsets, and
vertical components should be securely
supported with wall straps, as previously
described. Components of the vent which
are in occupied areas should be enclosed to
prevent accidental contact and damage to the
vent system. Insure that insulation, building
materials, or debris do not extend into the
required clearance spaces. In cold climates,
the exterior portions of the vent should be
enclosed in a chase. Outside portions of the
vent system with may be painted with high
temperature paint to help prevent rusting and
corrosion on the exterior surfaces.
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19
MAINTENANCE
1. An annual inspection is required to maintain
warranty of your Simpson Dura-Vent B-Vent
system. You will need to inspect the Cap, Vent
Pipe, Connector Pipe, and the connection to
the appliance.
2. Verify that the sealant around the Flashing
and Storm Collar is intact. Reseal as needed.
Remove Cap. Hold Cap by the collar only, and
unlock by twisting counterclockwise, and then
pull up. Grabbing the Cap by the outer edge
or top can cause damage to the Cap.
3. Inspect Cap for any physical damage or
damage from corrosion. Look for any foreign
material inside the cap or vent. (Example:
bird’s nest, leaves, etc.)
4. Shine a light down inside of the vent pipe.
Look for any evidence of damage, corrosion
or excessive condensation. Also, look for
any disconnected sections of the vent pipe
or connector pipe. Refer to the installation
instructions to reconnect pipe sections. If pipe
sections are damaged or corroded, replace
immediately!
5. Replace Cap by grabbing cap (by collar
only), and slide onto pipe section and twist-
locking (clockwise).
6. Inspect appliance connector and make
sure that the vent is securely connected to the
appliance.
7. Damaged or corroded parts should be
replaced immediately! Failure to do so can
lead to an extremely hazardous situation!
8. Follow your appliance manufacturer’s
recommended instructions for inspection your
appliance.
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L204A 07|2009
Customer Service Support 800-835-4429 707-446-4740 FAX wwww.duravent.com
Simpson Dura-Vent, Inc
PO Box 1510
Vacaville CA 95696-1510
Manufactured in Vacaville CA
and Albany NY
g
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a
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a
n
t
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e
Limited
Lifetime
w
a
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r
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t
y
SIMPSON DURA-VENT LIMITED LIFETIME WARRANTY
Simpson Dura-Vent Company, Inc. (“Simpson”) provides this limited lifetime warranty for all of its products to the original purchaser. Subject to
the limitations set forth below, Simpson warrants that its products will be free from substantial defects in material or manufacturing, if properly
installed, maintained and used. This Warranty is non-transferable and does not cover normal wear and tear, smoke damage or damage caused by
chimney res, acts of God, or any product that was: (1) purchased other than from an authorized Simpson dealer, retailer or distributor; (2) modi-
ed or altered; (3) improperly serviced, inspected or cleaned; or (4) subject to negligence or any use not in accordance with the printed materials
provided with the product as determined by Simpson. This limited lifetime warranty applies only to parts manufactured by Simpson.
Simpson provides the following warranties for its products: One Hundred Percent (100%) of the purchase price or MSRP at time of purchase,
whichever is lower, for 15 years from the date of purchase, and Fifty Percent (50%) thereafter, except for the following limitations: all Termination
Caps and DuraBlack® are warranted at One Hundred Percent (100%) for ve years, and at Ten Percent (10%) thereafter.
All warranty obligations of Simpson shall be limited to repair or replacement of the defective product pursuant to the terms and conditions ap-
plicable to each product line. These remedies shall constitute Simpson’s sole obligation and sole remedy under this limited warranty. This warranty
provides no cash surrender value. The terms and conditions of this limited lifetime warranty may not be modied, altered or waived by any action,
inaction or representation, whether oral or in writing, except upon the express, written authority of an executive ocer of Simpson.
LIMITATIONS ON INTERNET SALES:
Notwithstanding any other terms or conditions of this limited lifetime warranty, Simpson provides no warranty for the following specic products if
such products are both: (a) purchased from an Internet seller; and (b) not installed by a qualied professional installer: DuraTech®, DuraPlus HTC®,
PelletVent Pro®, FasnSeal®, and Simpson’s relining products including DuraLiner®, DuraFlex® 304, DuraFlex® 316, DuraFlex® Pro, DuraFlex® SW, and
Ventinox®. For purposes of this warranty, a trained professional installer is dened as one of the following: licensed contractors with prior chimney
installation experience, CSIA Certied Chimney Sweeps, NFI Certied Specialists, or WETT Certied Professionals.
Simpson reserves the right to inspect defective product to determine if it qualies for replacement under the terms of this limited lifetime warranty.
All warranty claims must be submitted with proof of purchase. Labor and installation costs are not covered under this warranty. To obtain warranty
service contact Simpson promptly at Simpson Dura-Vent Warranty Service, 877 Cotting Ct., Vacaville CA 95688, or call 800-835-4429.
WHERE LAWFUL, SIMPSON DISCLAIMS ALL OTHER WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIEDWARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENTWILL SIMPSON BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR SPECIAL DAMAGES OR
DIRECT OR INDIRECT LOSS OF ANY KIND, INCLUDING BUT NOT LIMITED TO PROPERTY DAMAGE AND PERSONAL INJURY. SIMPSON’S ENTIRE LIABILITY
IS LIMITED TOTHE PURCHASE PRICE OF THIS PRODUCT. SOME STATES DO NOT ALLOW LIMITATIONS ON IMPLIED WARRANTIES, OR THE EXCLUSION
OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU. THIS LIMITED
WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS THAT VARY FROM STATETO STATE.
For the most up-to-date installation instructions, see www. duravent.com
REV 2.5.09
All rights reserved, 2009. Made in the USA. Simpson Dura-Vent is a division of Simpson Manufacturing Company. NYSE:SSD.
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