How do I safely connect a 6'' flue pipe to a 9'' round clay chimney pipe liner?

by Fire Places on May 26, 2010

I just moved to a three year old house with a large fireplace. A cast iron wood burning/multi fuel stove would fit perfectly in the large opening. My problem is that the stoves I’ve looked at have six inch flue pipe diameters, while the clay liner coming from my chimney has a nine inch diameter. Will I need to have something fabricated or does anyone know a company that has an off the shelf solution that doesn’t cost a fortune?


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{ 7 comments… read them below or add one }

scott_kel May 26, 2010 at 7:22 pm

You should be able to find one off the shelf at a hardware store and just to clarify what others are saying it should be at least 26 gage or better yet 24 gage for wood/coal burning stoves.30 gage is used for ductwork and is too thin.

mayor r May 26, 2010 at 7:22 pm

it’ not my problem anymore

William B May 26, 2010 at 7:22 pm

any heating out fit , should have a reducer, or could make you one,

GG May 26, 2010 at 7:22 pm

I suggest you turn to a sheet metal shop and have them fabricate an increaser (or reducer) that will fit the flue on the equipment and the other end fit the chimney. Just make sure it is a tight fit. If you are concerned you can seal around the installation with heat resistant caulk.

John himself May 26, 2010 at 7:22 pm

There are off the shelf reducers made. Make sure you get the black iron heavy guage flue pipe reducer and not a galvanized heating duct unit.

Kevin D May 26, 2010 at 7:22 pm

Any supply house will have a reducer. Make sure it is heavy gague and not for ducting.

cowboydoc May 26, 2010 at 7:22 pm

You should be able to get a six to 9 inch reducer from anywhere, that’s not so uncommon. Go to Home Depot, Lowes, any hardware store, Ace

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