I want to install a Stainless steel chimney liner in my exterior
masonry chimney for my new high efficiency oil boiler. Boiler vent
pipe is 6" dia. Chimney interior is 7"x10".
The boiler installer said I need to install a tee section _inside_ the
chimney where the vent pipe (from the boiler) meets the chimney so
that gases can go up and any condensate can drip down into the
existing chimney cleanout below. He said to break out a section of
the chimney around the existing vent pipe opening in order make enough
space to insert the tee. Does this sound right?
If so, is there any special type of mortar I should use to repair
Thanks for the advice.
Is that 6" dia inside or out? Because if it's a 6" i.d. [inside dimension]
it won't fit in your chimney.
Why not have the boiler installer install your new flue? Let him worry
about all the problems you're going to run into.
6" dia inside. I tried with some leftover I had (from lining the
adjacent fireplace chimney) and it fits, but it gets a bit tight.
Boiler installer installs only boilers and nothing more.
I just thought his idea of breaking out the chimney masonry at the
base is a bit unusual. I never heard of it.
On Nov 11, 4:19 pm, firstname.lastname@example.org wrote:
Doh! If it fits a bit tight with just trying some leftover pieces,
it would seem to me the chances of getting this through the entire
length of the chimney is not good. And suppose it gets half way and
gets stuck? It's not like a tailpipe, where you can beat it with a
hammer and drive it on. This is one of those jobs where unless it
fit freely, I would not even attempt it.
On Nov 12, 7:44 am, email@example.com wrote:
Point taken. Perhaps this one's better left for an installer.
That being said, I'm still curious about the whole breaking the
chimney wall thing. Should I expect this (i.e. clear out basement
around boiler and prepare for a big dusty mess in the boiler room?)
If so, I'd rather not do in the dead of winter.
Thanks for the advice.
On Nov 12, 7:53 am, firstname.lastname@example.org wrote:
For the record, after seaching a while more I answered my own
states: "break out sufficient masonry to form a hole large enough for
the Mortar Sleeve or Flex Liner to pass through easily. If a Tee
application is necessary, a larger hole may be required."
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