User's Manual
23552-5-0608Page 26
Installing Vent Components (Figure 37)
Begin the vent system installation by installing the first Simpson 
Duravent component, 90° elbow to the starting collars or straight 
pipe on the top of the appliance, then the straight pipe length and 
then horizontal or vertical termination kit.
NOTE: All outer connection joints must be sealed with aluminum 
tape, screws or silicone sealant rated above 300°F/149°C. The 
inner flue joints do not require any sealant.
Simpson  Duravent  vent  system  components  lock  into  place  by 
sliding the concentric pipe  section  with four (4) equally  spaced 
interior  beads  onto  the  appliance  collar  or  previously  installed 
component  end  with  four  (4)  equally  spaced  indented  sections. 
When the internal beads of each starting outer pipe line up, rotate 
pipe section clockwise 90° (approximately 3 inches). The vent pipe 
is now locked together.
Continue  adding  components  per  the  pre-planned  vent  system 
configuration.  Be  certain  that  each  succeeding  vent  component 
is securely fitted and locked into the preceding component in the 
vent system.
Figure 37
WALL THIMBLE
(MAXIMUM
OF
THREE 90 ELBOWS)
(MAXIMUM
OF
TWO 90 ELBOWS)
Special Venting Components (Simpson Duravent)
See Empire Comfort Systems Retail Price List for Simpson Duravent part 
numbers and pricing.
Special DV Vent Kits
Available from Empire Comfort Systesm, Inc. dealers
DVVK-4FV Vertical Flex Vent Kit 4" x 7"
DVVK-4VP
(DVVK-4V)
Direct-Vent Fireplace Vent Kit - Vertical, Includes SD-991, 
SD-953, and SD-943
DVVK-4TP
(DVVK-4T)
Direct-Vent Fireplace Vent Kit for Top Vent, Thru-the-wall, 
8 to 11 inch wall thickness, Includes SD-911, SD-985, 
SD-990 and SD-942
DVVK-4RP
(DVVK-4R)
Direct-Vent Fireplace Vent Kit for Rear Vent, 5 to 7 inch 
wall thickness, (standard thru-the-wall venting) Includes 
SD-908, SD-985 and SD-942
DVVK-4RE
Direct-Vent Fireplace Vent Kit for Rear Vent, Thru-the 
wall, 5 to 7 inch wall thickness, (standard thru-the-wall 
venting) Includes SD-908, SD985 and SD-942
DVVK-4TSP
(DVVK-4TS)
Direct-Vent Fireplace Vent Kit for Top Vent, Thru-the-wall, 
5 to 7 inch wall thickness, Includes SD-908, SD-985, 
SD-990 and SD-942
VIB6A Vertical Inlet Baffle Kit for 6 5/8" diameter.
VIB7A Vertical Inlet Baffle Kit for 7" diameter.
VENT SYSTEM IDENTIFICATION










