Assure this inexpensive 3-4 inch Increaser is NOT used in your professional Insert install!

Hello

I have seen this in too many fireplace installs lately and all were done by experienced professionals. 4" flue liner is highly recommended and is used most of the time now in fireplace installations, however this single wall 3-4" increaser saves the installer alot of time and money but can cause problems. Stoves like a Quad CB1200 and a Breckwell 2000i do not have room for 4" diameter pipe up the back. Therefore the right pipe and adapters should be used to prevent smoke leaking into the house!

The proper set of pipes, stove adapter and flex adapter should be used to prevent smoke leakage
See pics, click to enlarge.

Here is a good example:

Pic 1-5 Quadrafire CB1200i
Pic 1 - Increaser with 4" liner hitting the back of the stove and being pushed apart
Pic 2 - Increaser by itself
Pic 3 - Inside increaser shows how the smoke in the stove can escape between the crimped edge of the flex liner and the increaser. This is not a safe design. RTV can seal it but the pressure will make it fail eventually! See red arrows.
Pic 4 - The proper set of pipes and increaser with flex adapter. The flex adapter does not let smoke up the side.
Pic 5 - Duravent Flex Adapter

Pic 6 - Breckwell 2000i correct pipes and adapters

 

Yikes

 

yup- and a liner adapter makes the install SO much easier........CRIMPED liner?! (and not even any RTV, just tape.......)........

 

Yep what a job!

 

curious Don, how much extra do you charge, over and above a cleaning, to rectify these issues?

 

Price of parts and small fee for install after the regular cleaning. That old increaser was RTVed on an I had to get out my sazall to get it off!