Reznor SCE Series - Specific Venting Requirements: Joints and Sealing

11
I-SCE (09-18) PN207697R9
Figure 8. Joining Double-Wall (Type B) Pipe to Vent Terminal Cap (Horizontal or Vertical)
• To seal the joint between the terminal section of double-wall vent pipe and a single-wall or Category III
vent pipe: follow the illustrated step-by-step instructions in Figure 9. Make this connection no more than 6 inches
(152 mm) from the concentric adapter box.
STEP 1
Place a continual 3/8” bead of silicone sealant
around the circumference of the vent cap col-
lar. This will prevent any water inside the vent
cap from running down the double-wall pipe.
Do STEP 2
immediately following STEP 1.
STEP 2
Insert the collar on the vent cap inside the
inner wall of the double-wall pipe. Insert
as far as possible. Add additional silicone
sealant to fully close any gaps between
the vent cap and the double wall pipe.
This is necessary to prevent water from
entering the double wall pipe.
Secure the vent cap to the double-wall pipe by drilling and inserting a 3/4” long
sheetmetal screw into the vent cap collar. Do not overtighten screw.
STEP 3
Figure 9. Joining Double-Wall (Type B) Pipe to Single-Wall or Category III Vent Pipe
Using Tapered Reducer
STEP 1
On the taper-type reducer, place a con-
tinual 1/4” bead of silicone sealant
around the circumference.
STEP 2
Insert the collar of the reducer into the
inner pipe of the double-wall pipe until
the bead of sealant contacts the inner
pipe creating a sealed joint.
STEP 3
Spaced equally around the double-wall
pipe, drill three small holes below the
sealant ring. Insert 3/4 inch long
sheetmetal screws to secure the joint. Do
not overtighten screws.
5" I.D.
Double-
Wall
Pipe
6" to 5" or
7" to 5"
Taper-
Type
Reducer
Do STEP 2
immediately
following
STEP 1.
Specific Venting Requirements: Joints and Sealing
Seal pipe joints as follows:
• To seal joints in Category III vent pipe: follow the pipe manufacturer’s instructions for joining and sealing
Category III vent pipe sections.
• To seal joints in single-wall vent and combustion air pipe: secure slip-fit pipe connections using sheet metal
screws or rivets. Seal all joints with aluminum tape or silicone sealant.
• To seal the joint in the terminal section of double-wall vent pipe (allowed ONLY ABOVE the concentric
pipes on a VERTICAL vent): follow the pipe manufacturer’s instructions for joining and sealing double-wall
vent pipe sections.
• To seal the joint between the terminal section of double-wall vent pipe and the vent cap: follow the illustrated
step-by-step instructions in Figure 8.
NOTE: Pipes and vent caps may not look exactly as shown in the illustrations. Instructions ap-
ply to both horizontal and vertical vent kits.