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Insul-Plug Black Masonry Chimney Thimble Hole Plug - 8-Inch Diameter - 810108
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Insul-Plug Black Masonry Chimney Thimble Hole Plug - 8-Inch Diameter - 810108

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$537.95 $659.99 18% Off
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Product Details

Manufacturer: Insul-Plug
Insul-Plug Part Numbers: 810108
Item Number: CPF-34250

Features

  • Blocks unused thimble holes in masonry chimneys
  • Made with completely fireproof materials
  • Plate covers 10" hole
  • Fits 7.75" to 8 1/8" diameter opening
If you have any experience with fireplaces, then no doubt you know of the paramount importance of maintaining a safe chimney. If you've got old or damaged components in your chimney ventilation system, then there's a big problem that needs to be addressed immediately. Don't let old or unused thimble holes, for instance, affect the safety of efficiency of your chimney. This Insul-Plug Masonry Chimney Thimble Hole Plug will seal any holes spanning up to ten inches in diameter. It's made with completely fireproof materials, ensuring the safety of your chimney system.

Customer Q&A with Product Specialists

Dave J. from Hebron,CT asked:
There must be some reason why I would choose this product to block an unused thimble (flue) rather than an end cap?
There must be some reason why I would choose this product to block an unused thimble (flue) rather than an end cap?
The plug adapts to a range of sizes, you insert the plug then tighten the center screw which expands the plug and creates a tight draft-proof fit.
Answered by: Kathy O.

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Rick W. from Ellenville, NY asked:
I converted my wood-burning fireplace to ventless propane. The damper in the fireplace is broken and the previous owners installed a cap. Can I use this to seal the hole left by the damper to keep heat from rising into the closed chimney?
I converted my wood-burning fireplace to ventless propane. The damper in the fireplace is broken and the previous owners installed a cap. Can I use this to seal the hole left by the damper to keep heat from rising into the closed chimney?
We do not recommend using this cover in your application because this cover is only meant for use over thimble openings in walls, not inside a firebox.
Answered by: Tyler M. - NFI Master Hearth Professional

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Stephanie from Maine asked:
We are purchasing a home that currently has two woodstoves exhausting into one chimney flue. Our homeowner's insurance says that one needs to be removed and capped before they will insure the property. We are electing to keep the woodstove on the lower le
We are purchasing a home that currently has two woodstoves exhausting into one chimney flue. Our homeowner's insurance says that one needs to be removed and capped before they will insure the property. We are electing to keep the woodstove on the lower le
This would indeed work for your application. It uses the center screw to expand and make a seal in the thimble.
Answered by: Brennan W.

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Peter from Gardner, MA asked:
On the front of the Insul-plug, what is the screw for? What are the installation instructions?
On the front of the Insul-plug, what is the screw for? What are the installation instructions?
The screw attaches the actual pan cover to the 'plug" . It fits tight into the pipe, exactly like a drain plug for a bathtub.
Answered by: Owen O.

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