How to Drill a 1 1/2' Hole in Firebrick? | Hearth.com ...
2012-3-15 · I tried a cheap 3/8 masonry bit on standard fire brick and it worked very well to mine out the center and perimeter of the 1 1/2 inch hole I needed. I have a quadrafire stove with air nipples in the back. I tried chiseling out the remainder and promptly cracked the brick in half.
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