Weil-McLain GOLD CGs User manual

87300
Part Number 550-141-873/0502
Venting Supplement
Vertical Direct Venting
ForusewithWeil-McLain Through-
RooforThrough-Unused-Chimney
Termination Kit
This Venting Supplement must only be used by a qualified installer/service
technician. Read these instructions completely before beginning the
installation. Failure to follow all instructions in proper order can cause
severe personal injury, death or substantial property damage.
To install a new vent system follow instructions in:
• This Venting Supplement.
• CGs Boiler Manual.
• Vent pipe manufacturer’s instructions supplied with vent material.
GOLD CGs
Gas-Fired Water Boiler

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Table of contents
1. Please — read before proceeding.................................3
Hazard definitions .................................................................................... 3
Venting method definitions ..................................................................... 3
To the installer.......................................................................................... 3
2. Determine venting method ..........................................4
Direct exhaust vent methods .................................................................. 4
Direct vent methods................................................................................. 5
3. Combustion air supply — eliminate contamination .....6
4. Obtain vent system components .................................7
5. Install vent starter .....................................................10
6. Vertical direct vent — vent termination .................... 11
7. Installation guidelines ............................................... 11
8. Verify vent system length ..........................................12
9. Installation — assembly ............................................. 14

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Hazard definitions The following terms are used throughout this Venting Supplement to bring
attention to the presence of hazards of various risk levels or to important
information concerning the life of the product.
Indicates presence of hazards that will cause severe
personal injury, death or substantial property damage.
Indicates presence of hazards that can cause severe
personal injury, death or substantial property damage.
Indicates presence of hazards that will or can cause
minor personal injury or property damage.
Indicates special instructions on installation, operation
or maintenance that are important but not related to
personal injury or property damage.
1. Please — read before proceeding . . . . .
To the installer Boiler must be vented and supplied with combustion
air as described in this supplement.Failure to do so will
result in severe personal injury, death or substantial
property damage.
Venting method
definitions Direct vent — Uses outside combustion air with combustion air connector
piping sealed at all joints and seams. Also known as sealed combustion.
All CGs flue gas vents are pressurized, requiring careful sealing of all joints.
See also CGs Venting Supplement — Direct Vent: Sidewall & Direct
Exhaust:Vertical and Sidewall
for alternate direct vent method.
Direct exhaust venting — Uses inside combustion air with no combustion
air connector piping. All CGs flue gas vents are pressurized, requiring careful
sealing of all joints. Also known as non-direct venting. See CGs Venting
Supplement — Direct Vent: Sidewall & Direct Exhaust: Vertical and
Sidewall venting supplement for application information.
Chimney draft vent — Uses the natural draft provided by a vertical vent
or chimney. (This method cannot be used with CGs boilers.)
Use only the sealant specified by the vent pipe
manufacturer, applied per their instructions. Vent
piping must be sealed gas-tight to prevent possibility
of flue gas spillage and carbon monoxide emissions,
resulting in severe personal injury or death.
Provide combustion and ventilation air openings as
described in the CGs Boiler Manual and this
supplement. Failure to provide adequate air supply
could result in severe personal injury, death or
substantial property damage.
Chimney draft venting cannot be used for CGs
boilers. Vent system must be constructed only using
venting materials listed in this Venting Supplement.
Existing vertical vents or chimneys may only be used as
raceways for routing vent or vent/air piping as described
in this supplement or CGs Direct Vent Supplements.

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2. Determine venting method
Direct exhaust ventingDirect exhaust venting
Direct exhaust ventingDirect exhaust venting
Direct exhaust venting
Use only when openings for inside combustion air can
be supplied in accordance with the CGs Boiler manual,
this venting supplement and with all applicable codes.
You must direct vent the boiler if the boiler area may
contain contaminants as described in this supplement.
Two direct exhaust vent options are permitted: sidewall
and vertical, per instructions in
CGs Direct Venting:
Sidewall
& Direct ExhaustVenting:Vertical or Sidewall
Venting Supplement.
Figure 1 Typical sidewall direct exhaust
vent installation
87250
2. Vertical direct exhaust venting
— using penetration through roof or using existing
unused chimney or vent as raceway for vent pipe.
See Figure 2.
See instructions in CGs Direct Vent: Sidewall &
Direct Exhaust: Vertical or Sidewall
Venting
Supplement.
Figure 2 Typical vertical direct exhaust
vent installation
87251
To prevent potential of severe personal injury or death,
check for areas and products listed on page 6 before
installing boiler. If found:
•remove products permanently
— OR —
•provide outside combustion air (direct vent
installation).
1. Sidewall direct exhaust venting
— using vent manufacturer’s termination fittings
listed in this supplement. See Figure 1.
See instructions on pages 6, 7, 8, 9 and 10 – 13.

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Direct vent methodsDirect vent methods
Direct vent methodsDirect vent methods
Direct vent methods
Combustion air is provided by air piping connecting
from the boiler Air intake fitting to the outside.
You must direct vent the boiler (pipe outside air to
boiler air intake fitting) if the boiler area may contain
contaminants as described in this supplement.
Two direct vent options are permitted:
1. Sidewall direct vent
— using Weil-McLain Vent/Air IntakeTermination
Kit
. See instructions in CGs Direct Vent: Sidewall
& Direct Exhaust: Vertical or Sidewall
Venting
Supplement. Termination kit is included with CGs
boiler. See Figure 3.
2. Vertical direct vent
— using Weil-McLain Through-Roof orThrough-
Unused-ChimneyTermination Kit
.Instructions for
vertical direct venting are covered in this
supplement. See Figure 4.
Figure 3 Typical sidewall direct vent
installation
Figure 4 Typical vertical direct vent
installation
87203
87205

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3. Combustion air supply —
eliminate contamination
Table 1 Corrosive contaminants
To prevent potential of severe
personal injury or death, check for
areas and products listed below
before installing boiler. If found:
•remove products permanently
— OR —
•provide outside combustion air
(direct vent installation).
Please review the following information on potential
combustion air contamination problems.
Refer to Table 1 for products and areas that may cause
contaminated combustion air. These contaminants may
cause damage to the vent piping, and must be eliminated
If the boiler is installed in any area likely to cause
contamination, or if products which would
contaminate the air cannot be removed, you must pipe
combustion air to the boiler air intake. Contaminated
combustion air will damage the boiler, resulting in
possible severe personal injury, death or substantial
property damage. Do not install a CGs boiler in a
laundry room or pool facility, for example, without
using ducted outside air. These areas will always contain
contaminants.
from the boiler combustion air supply.You may do this
by removing the contaminants permanently from the
area or piping air directly to the boiler (direct vent) using
one of the methods referenced in this supplement and
described in the direct vent supplements.
Products to avoid Areas likely to have contaminants
Spray cans containing chloro/fluorocarbons Dry cleaning/laundry areas and establishments
Permanent wave solutions Swimming pools
Chlorinated waxes/cleaners Metal fabrication plants
Chlorine-based swimming pool chemicals Beauty shops
Calcium chloride used for thawing Refrigeration repair shops
Sodium chloride used for water softening Photo processing plants
Refrigerant leaks Auto body shops
Paint or varnish removers Plastic manufacturing plants
Hydrochloric acid/muriatic acid Furniture refinishing areas and establishments
Cements and glues New building construction
Antistatic fabric softeners used in clothes
dryers Remodeling areas
Chlorine-type bleaches, detergents, and clean-
ing solvents found in household laundry rooms Garages with workshops
Adhesives used to fasten building products and
other similar products

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The following special gas vent systems comply with UL-1738 and ULC-
S636 standards and are certified by CSA as the only systems suitable for
use with CGs boilers:
• Heat-Fab, Inc. Saf-T Vent®
• Flex-L International, Inc. StaR-34
• Z-Flex®, Inc. Z-Vent II
•ProTechSystemsFasNSeal™
Use only the vent starter of the same manufacturer as the vent compo-
nents. Do not mix components from different systems. The vent system
could fail, causing flue gas spillage, resulting in severe personal injury or
death.
4. Obtain vent system components
1. The Through-Roof or Through-Unused-Chimney Termination Kit
provides special parts required to route 3-inch stainless vent pipe
through 5-inch B-vent. The space between the vents provides the
passage for combustion air. See page 9 for parts included with the kit.
2. Verify that the vent termination will comply with the requirements
listed on page 11. Then verify that the vent and air piping will not
exceed the length limits given in section 8 of this supplement before
locating boiler or floor/roof penetrations.
3. You will need to obtain stainless vent pipe and fittings, using only the
vent systems listed in the CGi, CGs & GV Vent Component
Supplement. Also obtain B-vent pipe and fittings for the vertical run
and floor/roof penetrations (See Table 3).
4. Use suitable 3" material for combustion air connector piping, such as:
• Dryer vent
• Galvanized steel
• PVC (3" I.D.)

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Termination coupling
Elastomer
flashing*
5”Type “B”
storm ring
5”Type “B”
adjustable
flashing
5”Type “B” rain cap with
hole in top for vent pipe
For minimum height
followType “B” gas
vent manufacturer’s
instruction
Fire stop
5”Type “B” stack
Vent pipe
5” type “B” support
5” type “B” draft hood connector
Single wall stack
reducer tee*
Cap with hole
for vent pipe
Elastomer
flashing*
Air intake pipe – 3” pvc,
standard 3” galvanized
or aluminum single
wall pipe, or 3” flexible
dryer vent
3” vent pipe:
Heat-Fab Saf-T Vent
Z-Flex Z-Vent II
Flex-L International StaR-34
ProTech Systems FasNSeal™
®
®
Vent starter must be
by same manufacturer
as the vent pipe.
87303
* furnished in kit
Fire stop
CGs boiler
Condensate drain line
4. Obtain vent system components (continued)
Figure 5 Typical installation,
showing component
identification

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Figure 6 Parts provided in kit Table 2 Parts provided in kit
1
2
6
3
4
7
85
87302
Table 3 Parts below are required for installation and are provided by installer (not included in kit)
Item Description Qty
1Tee —
galvanized 5" x 5" x 3" 1
2Vent clamp 5
3Bottom cap —
galvanized with 4 ½" hole 1
4Vent support 1
5Elastomer grippers 11
6Screws — sheet metal
type A, #10 x 1¼" 11
7Screws — sheet metal
type A, #10 x ½" 3
8Elastomer flashing 2
Description Quantity
Rain cap, galvanized, 5" 1
Adjustable flashing, type B, 5" 1
Fire stop for each floor or attic penetration 1
Storm ring, type B, 5" 1
Support, type B, 5" 1
Draft hood connector, type B, 5" 1
Adequate B-Vent with clamp rings for combustion air run (less than 30 feet) --
Adequate 3" vent material for vent run and elbows from one of the following (See Note):
• Heat-Fab, Inc. — Saf-T Vent
®
• ProTech Systems — FasNSeal™
• Flex-L International, Inc. — StaR-34 • Z-Flex
®
, Inc. — Z-Vent II
--
Adequate sealant specified by vent pipe manufacturer’s instructions --
Adequate 3" PVC, galvanized or dryer vent (for combustion air supply piping between tee and boiler) --
Note: Do not mix types of vent material. CSA certification will be void.

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5. Install vent starter
87208
Saf-T Vent®
starter
Band clamp
screw
Band clamp
strap
Blower
housing
outlet
³⁄₈ " Bead of
sealant
87209
Band clamp
screw
Band clamp
strap
Blower
housing
outlet
3/8" Bead
of sealant
StaR-34
starter
87210
Z-Vent II
starter
Feed
position
Tighten
position
Band clamp
screw
Band clamp
strap
Blower
housing
outlet
³⁄₈ " Bead
of sealant
87211
FasNSeal™
starter
Band clamp
screw
Band clamp
screw
Band clamp
strap
Blower
housing
outlet
Figure 7
FasNSeal™vent starter
Figure 8
Z-Vent II vent starter
Figure 10
StaR-34 vent starter
Figure 9
Saf-T Vent®vent starter
1. Select a vent pipe manufacturer and obtain all vent
components needed, based on boiler location and
venting method.
2. You must use the vent starter made by the vent pipe
manufacturer. See separate CGi, CGs & GV Vent
Component Supplement, for part numbers of each
component, listed by vent manufacturer.
Use only the vent starter of the same
manufacturer as the vent compo-
nents. Do not mix components from
different systems. The vent system
could fail, causing flue gas spillage,
resulting in severe personal injury or
death.
3. Follow all applicable national, state, local or
provincial codes when venting the CGs boiler.
4. Connect vent starter to blower housing outlet as
shown in the Figures 7 through 10, below.
a. Do not mix components from different vent
manufacturers.
b. Maintain minimum 2" clearance from
combustible materials to vent pipe.
c. Seal with sealant specified by vent pipe
manufacturer, using ³⁄₈" bead (not required for
FasNSeal™).
d. Tighten strap at band clamp screw until strap is
snug around blower housing.

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Follow instructions on this page
when determining vent location to
avoid possibility of severe personal
injury, death or substantial property
damage.
6. Vertical direct vent — vent termination
1. Locate the boiler and vent penetration through the
roof so all requirements on this page will be met.
Also follow vent manufacturer’s instructions.
2. Gases will form white plume in winter. Plume could
obstruct window view of nearby windows in multi-
story buildings.
3. Prevailing winds could cause freezing of condensate
and water/ice buildup on vent termination, building,
plants or roof. Ice buildup on vent termination can
cause boiler shutdown and building freezeup.
4. Locate or guard vent termination to prevent
condensate from damaging exterior surfaces.
5. Locate the vent termination well away from trees,
shrubs, and decorative items.
6. Locate or guard vent to prevent accidental contact
by people or pets.
7. Do not terminate vent in window well, stairwell,
alcove, courtyard, or other recessed areas.
8. Do not wrap or insulate vent pipe or fittings.
9. Do not connect:
• Any other appliance to vent pipe.
• Multiple boilers to a common vent pipe.
10. Canadian installations — See B149.1 or B149.2
Installation Code. Terminate vent no less than 6 feet
from another combustion air inlet, 3 feet from any
other building opening, and 3 feet from any gas
service regulator.
11. The vent must terminate:
• more than 1 foot below or to side of all doors
or windows.
• more than 1 foot above grade or anticipated
snow line.
• 3 feet above any forced air intake within 10
feet.
12. Vent must also terminate:
• at least 6 feet away from adjacent walls.
• no closer than 5 feet below roof overhang.
• at least 4 feet horizontally (and in no case above
or below unless a 4 foot horizontal distance is
maintained) from electric meters, gas meters,
regulators, relief valves, and other equipment.
13. Site conditions may dictate greater clearances.
Do not terminate the vent adjacent
to a wall or below any building
extension such as eaves, parapets,
balconies or decks. Failure to
comply could result in severe
personal injury, death or substantial
property damage.
14. Multiple boilers may be vented with vent
terminations at the same height. Space
terminations to provide a minimum of 1 foot
between pipes for U.S. installations. For Canadian
installations, provide clearances required by
B149.1 or B149.2 Installation Code.
7. Installation guidelines
1. Codes — Install vent and combustion air piping in
compliance with all applicable national, state, local
or provincial codes.
2. Do not connect:
• Any other appliance to combustion air or vent
piping.
• Any other appliance into or through chimney
when using existing chimney as raceway.
• Multiple boilers into common vent.
3. Vent length limits — Position boiler as close as
possible to vertical vent/air run. Do not exceed vent
length limits given in Section 8 of this supplement.
B-vent limit is 30 feet. Vent or air max. lengths are:
• CGs-3 & CGs-4: Max 55 equivalent feet
• CGs-5 & CGs-6: Max 45 equivalent feet
4. Materials and construction —
• Seal all B-vent combustion air joints with
approved silicone sealant (Dow Corning 700™
or 732™, General Electric 108 or 800, or sealant
specified by vent pipe manufacturer. B-vent
sections must be straight — no elbows.
• Construct vent joints per vent manufacturer’s
instructions, including use of their specified
sealant. Vent pipe routed inside B-vent must
also be fitted with vent clamps with elastomer
grippers, installed per section 9 of this
supplement.
• Use only one of the approved vent systems listed
in Table 2. Do not mix types of vent material.
CSA certification will be void.
5. Install boiler per CGs Boiler Manual.

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8. Verify vent system length
The vent or air piping must be no longer than the
maximum value given in Tables 4 and 5. Note in the
tables that the maximum length of connector piping
(vent or air piping between boiler and B-vent tee
connection) depends on the number of elbows and the
length of the B-vent section. The reason for this is that
each 90-degree vent or air pipe elbow cause the same
pressure drop as 7 feet of straight pipe.
Vent/air piping length verification
procedure:
Step 1 — Determine dimensions of vent/air pipe
needed for planned location
Measure or calculate the vent/air pipe lengths required
for the planned location of the boiler and floor/roof
penetrations. See Figure 11 for a typical layout.
• How long will the vertical B-vent section have to be?
Round up to the nearest 5 feet (for example, if B-vent
length needs to be 12 feet, round this amount up to the
nearest 5 feet — use 15 feet for your B-vent length).
(This is dimension Lin Figure 11.)
• How many elbows will be needed in the vent connector
piping (from boiler to B-vent tee)?
• How many feet of vent piping will be needed for the
connector runs?
(This would be the sum of dimensions C & Din Fig. 11.)
• How many elbows will be needed in the air connector
piping (from boiler to B-vent tee)?
• How many feet of air piping will be needed for the
connector runs?
(This would be the sum of dimensions A& Bin Fig. 11.)
Step 2 —Verify that vent connector piping is within
allowable limits
Use Table 4 or 5, depending on boiler model to be used.
Find the row with the B-vent length the installation
requires. Move across to the column with the number
of vent elbows needed for the installation. This number
is the maximum allowable vent connector piping length.
Step 3 — Verify that air connector piping is within
allowable limits
Use Table 4 or 5, depending on boiler model to be used.
Find the row with the B-vent length the installation
requires. Move across to the column with the number
of air pipe elbows needed for the installation. This
number is the maximum allowable air pipe connector
piping length.
Example verification (Figure 11Figure 11
Figure 11Figure 11
Figure 11):
Step 1 — Vent/air piping required per plan
As an example, consider an installation of a CGs-5
boiler, where the boiler and vent/air locations would
require:
• Boiler model = CGs-5.
• B-vent length (L) = 20 feet.
• Vent connector piping requires 2 elbows.
• Vent connector piping length (D + C) = 16 feet.
• Air connector piping requires 1 elbow.
• Air connector piping length (B + A) = 17 feet.
Step 2 — Verify vent piping
• Enter Table 5 at the row for B-vent length of 20
feet.
• Move to the 2-elbow column.
• Read a maximum connector pipe length of 18 feet.
Conclusion — Vent piping is within limits because
vent connector piping would only be 16 feet (less than
the maximum of 18 feet).
Step 3 —Verify air piping
• Enter Table 5 at the row for B-vent length of 20
feet.
• Move to the 1-elbow column.
• Read a maximum connector pipe length of 25 feet.
Conclusion — Air piping is within limits because air
connector piping would only be 17 feet (less than the
maximum of 25 feet).
Step 4 — Replanning
No replanning needed. Vent and air piping lengths are
within limits.
Step 4 — Replan boiler location & piping if piping
length of vent or air is too long
See if boiler can be moved closer to vertical vent/air
piping.
See if you can reduce the number of elbows required
vent piping must have 2 elbows minimum in order to
provide horizontal piping to install condensate drain
tee.

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Figure 11 Typical vent/air pipingTable 4 CGs-3 and CGs-4
Maximum connector pipe length, vent or air:
• Combustion air connector pipe
• Vent connector pipe
87304
D
L
L= B-vent length
A
B
C
Elbow
Elbows
Vent piping
Combustion air piping
A + B
C + D
= Combustion air
connector piping length
= Vent connector piping length
Condensate
drain line
CGs-3 and CGs-4
“B-Vent”
length
(feet)
L
Total number of elbows
1 2 3 4 5 6 7
Max. length from boiler to “B-Vent”
5 504336292215 8
10 45 38 31 24 17 10 3
15 40 33 26 19 12 5 --
20 35 28 21 14 7 -- --
25 30 23 16 9 2 -- --
30 25 18 11 4 -- -- --
Note: Combustion air connector pipe length = A + B
Vent connector pipe length = C + D
CGs-5 and CGs-6
“B-Vent”
length
(feet)
L
Total number of elbows
1 2 3 4 5 6 7
Max. length from boiler to “B-Vent”
540332619125--
10 35 28 21 14 7 -- --
15 30 23 16 9 2 -- --
20 25 18 11 4 -- -- --
25 20 13 6 -- -- -- --
30 15 8 1 -- -- -- --
Note: Combustion air connector pipe length = A + B
Vent connector pipe length = C + D
Table 5 CGs-5 and CGs-6
Maximum connector pipe length, vent or air:
• Combustion air connector pipe
• Vent connector pipe

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9. Installation — assembly
Assemble B-vent piping Step 1
1. Install 5" type Bsupport, B-vent combustion air run,
flashing, fire stops and storm collar per
manufacturer’s instructions.Apply approved sealant
to each B-vent joint. See Figure 12.
2. Install type Bdraft hood connector to bottom of
combustion air run. Seal with approved sealant.
Figure 12 Sealing B-vent joints
87306
87305
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Figure 13 Apply elastomer strips to vent clamps
Figure 14 Install vent clamps on vent piping
1. From top or bottom of combustion air run, install
vent piping.
• Top of vent piping must extend 3" above
top of rain cap. See Figure 5, page 8.
• Bottom of vent piping must extend 18"
below draft hood connector.
2. At each vent joint:
a. Follow vent pipe manufacturer’s instructions to
assemble and seal joints. Sealant recommended
by vent pipe manufacturer must be used as
indicated in their instructions.
b. Apply 2 self-adhesive elastomer grippers to vent
clamp. Grippers must be positioned on clamp
as shown in Figure 13.Bend out 2 ears on vent
clamp.
Prepare & insert vertical vent Step 2
c. Fasten clamp around vent pipe with 2 – 1¹⁄₄"
screws in top and bottom holes, about every 5
feet. See Figure 14.Tighten screws until clamp
does not turn or slide around vent piping.

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Install vent support
1. Apply 1 elastomer gripper to vent support.
2. Intall vent support around vent piping just below
draft hood connector as shown in Figure 15. Fasten
support around vent piping with 1 – 1 ¹⁄₄" screw.
3. Tighten screw until support does not turn or slide
around vent piping.
Install 5" x 5" x 3" tee
Step 3
Step 4
1. Slide tee over vent piping and attach uncrimped end
to bottom of draft hood connector:
a. Drill 3 holes in tee for ¹⁄₄" sheet metal screws.
Do not allow drill to
penetrate vent pipe. Drill
holes carefully in tee and use
only 1 /
4" screws to fasten tee
to draft hood connector.
Failure to do so can damage
vent pipe, causing severe
personal injury or substantial
property damage.
b. Seal all seams and screws with approved sealant.
2. Secure bottom cap to tee with duct tape. Slide
elastomer flashing up around vent pipe and tuck
lip into cap’s bottom opening. Seal with approved
sealant.
Follow vent pipe manufacturer's instructions to
assemble and seal joints. Sealant recommended by vent
pipe manufacturer must be used as indicated in their
instructions.Vent and combustion air connector piping
must be sealed gas-tight to prevent possibility of flue
gas spillage and carbon monoxide emissions, resulting
in severe personal injury or death.
Draft hood
connector
Vent
support
87308
5” x 5” x 3”
Te e
Elastomer
flashing
Draft hood
connector
Bottom cap
87309
Figure 15 Install vent support
Figure 16 Install tee

GOLD CGs Gas-FGOLD CGs Gas-F
GOLD CGs Gas-FGOLD CGs Gas-F
GOLD CGs Gas-Fired Wired W
ired Wired W
ired Water Boilerater Boiler
ater Boilerater Boiler
ater Boiler
Part Number 550-141-873/0502
16
Step 5 Install rain cap
1. On roof, cut 4 ¹⁄₂" hole in top of rain cap and
install cap over protruding vent pipe. Slide
elastomer flashing down around vent pipe
and tuck lip into cap’s top opening.
2. Connect termination coupling to vent pipe
using vent pipe manufacturer’s specified
sealant.
9. Installation — assembly continued
Finish installation
1. Complete vent piping to boiler, making sure to follow vent pipe manufacturer’s instructions and Weil-McLain
vent manufacturers special gas vent system vent and combustion air venting supplements.
2. Use any of the following to install combustion air connector piping from tee to boiler, making sure to seal all
joints and seams:
a. 3" Flexible dryer vent — A piece of 3" galvanized is required at each end to adapt. Seal all pipe joints and
seams between pipe and dryer vent with approved sealant.
b. Galvanized or aluminum single wall pipe — Seal all joints and seams using approved sealant.
c. 3" PVC — Seal all joints using PVC cement.
3. Condensate drain line — A condensate drain fitting is always required for through-roof vents. Follow vent
manufacturer’s instructions to install condensate drain line.
Use only silicone tubing rated for at least 400°F for the first 18" of condensate drain line, then
other non-metallic tubing may be used. Using any other material could cause flue gas leakage,
potentially resulting in severe personal injury, death or substantial property damage.
4. Multiple boilers may be vented with vent terminations at the same height. Space terminations to provide a
minimum of 1 fott between pipes for U.S. installations.For Canadian installations, provide clearances required
by B149.1 or B149.2 Installation Code.
Step 6
Vent pipe
Elastomer
flashing
Rain cap
87310
Figure 17 Install rain cap