Manual
8
Figure 7
INSTALLATION INSTRUCTIONS 
FOR CONVERTING A MASONRY 
CHIMNEY
Important: The existing masonry ue 
opening needs to have an area of at least a 
35-sqr-in. to insure proper intake / exhaust 
ow. 
Step 1.  Before cutting any holes, assemble 
the desired sections of black direct vent 
pipe to determine the center of the masonry 
penetration.
Step 2. Once the center point of the 
penetration has been determined, cut a 6” 
diameter hole in the masonry. Be careful, 
if the hole is too large, the Retro Connector 
might not mount properly, and if the hole is 
too small, then the appliance might starve 
for intake air. If there is a frame wall in front 
of the masonry wall, cut and frame a 10” clear 
square opening in wall (centered around the 
6” masonry opening). If there is sheet rock 
only (no studs) in front of the masonry, the 
10” clear opening is still needed, but does 
not need to be framed. This allows the Retro 
Figure 6
TYPICAL MASONRY CHIMNEY 
CONVERSION
Termination Cap
Top Adapter
Flashing
4” Flex Liner
Retro 
Connector
Black Direct 
Vent Pipe
Cut & bend ashing as 
needed to t chimney
Sealant adhesive              










