Replacing Thimble

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whistlenut
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Post Mon. Feb. 25, 2013 10:15 am

If you did this without rubber gloves, how are the cracks in your skin holding up? Refractory is a great product, but protect the finger tips. Nice removal and replacement. Great photos...and thanks for sharing.

Last week I was troubleshooting a low draft situation, and found a galvie thimble that was INSIDE the flue 5". We removed it and replaced it with 1/2" inside the flue. Problem solved, but that one deserves a WTF trophy!!! :idea: :!: :shock: :roll:
"Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a 'piece of human solid waste' by the clean end." More true today....


loxety
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Post Mon. Feb. 25, 2013 10:39 am

buffalo bob wrote:take some rich stiff mortar almost like putty reach ur hand in there and pack it full of mortar at the joint of the thimble and the flue liner...refractory cement would be great as it will withstand the heat better reaching in there 12 inches is for sure a hand job...tools just wont git it packed in very good...
Thank you for the advice!

loxety
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Post Mon. Feb. 25, 2013 10:51 am

whistlenut wrote:If you did this without rubber gloves, how are the cracks in your skin holding up? Refractory is a great product, but protect the finger tips. Nice removal and replacement. Great photos...and thanks for sharing.
I'll make sure to put some gloves on, my wife would hate for me to ruin my soft hands :D

loxety
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Post Mon. Feb. 25, 2013 11:08 am

whistlenut wrote:Last week I was troubleshooting a low draft situation, and found a galvie thimble that was INSIDE the flue 5". We removed it and replaced it with 1/2" inside the flue. Problem solved, but that one deserves a WTF trophy!!! :idea: :!: :shock: :roll:
I think its a 24 foot chimney with 8 inch square clay liner. I noticed some air blowing into the house from the thimble area. I was thinking it was because the top of the chimney is not level with the top of the roof, maybe two feet above where the gutters are supposed to be. Two chimneys were built many years after the house was built, on the side of the house.

In the photo, the chimney that is closest is the one I am connecting the stove to, the other is used for an old in the floor type oil furnace. A couple years ago when we used oil sparingly it cost about $1800 for 5-6 months of heating at $3/gal. Now that oil is above $3/gal electric space heating has been cheaper.
Attachments
Chimneys.jpg

loxety
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Post Mon. Feb. 25, 2013 11:25 am

freetown fred wrote:I know this is only my thoughts, but, if you've got 8" tile--or even 6" I would cut that thimble so it only goes into the near side of the clay tile an inch or a little more. It will give you a lot better draw.
Are you saying that it would be best if possible to have the thimble inserted into the chimney liner an inch or so? I think that in order to do that I'd have to chisel away some of the clay tile and hope it doesn't break :D Its a tight fit currently (not very straight either). At the local brick yard, Frederick Block here in Winchester, VA they have 6 inch diameter thimbles in 12 or 24 inch lengths only. I wonder if I should have bought the 24 inch and have the thimble stick out of the wall more. From the chimney its, liner - > cinder block -> ship lap wood siding -> lathe and plaster.
Attachments
Side view of inserted thimble.jpg
Last edited by loxety on Mon. Feb. 25, 2013 11:28 am, edited 2 times in total.

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freetown fred
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Post Mon. Feb. 25, 2013 11:26 am

Light some rolled up newspaper & hold it by the thimble--if it draws the smoke OUT---you're good---I repeat---how far into the liner is your thimble???? You should put a cap on the tile up top if you can get to it.
"A people that values it's privileges above it's principals, soon loses both"--Dwight D Eisenhower

loxety
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Post Mon. Feb. 25, 2013 11:29 am

There is really only about 1/4 inch to maybe 1/2 inch over hang from edge of the plaster to the end of the clay thimble and less then and inch from where the liner and clay thimble would meet. No over hang in the liner. The liner is square and the thimble is round as seen in the pictures.

loxety
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Post Mon. Feb. 25, 2013 5:22 pm

Installed the new thimble with ASTM C199 refractory Mortar, purchased at Frederick Block Winchester, VA was $47 for a 50lbs bag.

Now we wait for it to dry... :D
Attachments
New thimble set in place.jpg
Refractory mortar.jpg
ASTM C199 Refractory Mortar
Mortar mixed.jpg


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freetown fred
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Post Mon. Feb. 25, 2013 8:11 pm

Looks real good L :)
"A people that values it's privileges above it's principals, soon loses both"--Dwight D Eisenhower

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buffalo bob
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Post Mon. Feb. 25, 2013 9:44 pm

nice looking job...couldn't of done a better job myself...now keep an eye on it every time u clean out if it cracks wip up a little refract cement and patch it up...looks like u have plenty of cement...keep it dry don't sit the bag on the concrete floor sit it on a piece of ply wood...better yet put the whole bag into a nice heavy plastic garbage bag and tape it up,then set it on the wood..stuff to expensive to waste...every once and awhile thump the bag to keep it loosened up....u could also patch the room side up with it...

loxety
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Post Tue. Feb. 26, 2013 9:52 am

We have draft :D
Attachments
We have draft.jpg

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buffalo bob
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Post Tue. Feb. 26, 2013 10:15 am

loxety wrote:We have draft :D
yes u do looks good...now use some of that refract cement and patch up the hole around the pipe in the room try to push it in as far as u can..then take damp sponge and clean up wall...

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freetown fred
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Post Tue. Feb. 26, 2013 10:42 am

Didn't I say roll up some paper???? Not some stinking candle :mad: :clap: toothy ---ain't it grande when a plan comes together? ;)
loxety wrote:We have draft :D
"A people that values it's privileges above it's principals, soon loses both"--Dwight D Eisenhower

loxety
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Post Wed. Feb. 27, 2013 7:50 pm

Thanks to everyone that helped out I was able to get everything hooked up and passed code inspection this morning. I've got the stove going now, lots of heat! :D Now to figure out if I am putting too much air in this stove or not.. How would I figure that out with out a thermometer on the stove and or pipe?

BTW it only took about 3 hours to get the coal lit lol!

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Wiz
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Post Wed. Feb. 27, 2013 8:37 pm

This will help you on draft. Manometer Install
Randy
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