HElp with chimney install

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joshuaviktor

New Member
Dec 19, 2005
234
Northwest New Jersey
I am putting stainless steel 316ti flex liners, 6 inch, into an unlined brick chimney. I will eventually insulate, when I have the money to do so.

One of these liners goes down the chimney, into a fireplace, down through an ash dump, and to the basement, where it hooks up to a wood/coal stove.

The ashdump is tile pipe (ceramic) inside 8 feet of rock (no combustibles). The pipe is too small to fit the darn liner down it. I can break out the pipe, and still be surrounded by solid rock, but I am not really wanting to break out the pipe. This setup is temporary. Eventually, the liner is getting shortened for an insert in that fireplace, and the basement stove is getting its own flue, next to the oil-burners.
I have to rebuild the sucker anyway sometime in the next 3-5 years, might as well do it double flue, yes?

Question: Can I push the liner into the top of the ash dump, and seal it with 136 cement, and do the same at the bottom to bring it to the stove?

Probably not, and probably just have to bite the bullet, and break out the pipe, but wanted to get second (third, fourth ) opinion.

Thanks!

Joshua
 
What is the inside diameter of the tile pipe, how long is it and is it straight?
 
rough guess, 5.5 inches diameter, foot or so straight down, 90 degree turn, 2 foot or so gentle downslope into the basement.

The tile actually IS the ash dump. There is a cover on it, similar to a cookstove burner cover, then it narrows to the tile tipe, makes a right angle turn, and dumps down into the basement. Actually, the downslope is fine, it is not tile piped, it is just rock, and plenty big. It is the foot or so straight up and down that is tile piped.

Also, assuming I break out the tile pipe, how good are those flex liners with a short radius 90? I bought a 90 elbow, in black stovepipe, just in case. Can I use that?

Thanks! Joshua
 
I'm not sure about your fireplace construction, but ours was rubble filled below the fireplace floor bricks and about 1" of cement. In the crawlspace it looked like a solid concrete monopour, but wasn't once I got to smashing it out. So you might enccounter some loose stones or a few really big rocks (or both) alongside of the ash pit pipe. This is in an old farmhouse where I suspect they economized where possible and there were lots of stones on the property.
 
This was built in 1736, before they had much concrete. LOTS o big rocks around. I might get loose rocks. I'll see. But thanks for the warning.
 
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