BRC PEEPHOLE 3 GROOVE BRICK, 7 SIDE, 3″ BRICK When ordering firebricks, always specify the Paragon kiln model number, which is listed on the kiln’s safety data plate.
The peephole brick comes undrilled. At the factory we drill peepholes with a large, tapered drill bit. You can improvise, however, by drilling the peephole with a 1/4″ bit. Use a hacksaw blade or knife to expand the hole. For final shaping, wrap a piece of sandpaper around the peephole plug and rotate inside the new peephole.
The bottom of the peephole should be horizontal, or parallel to the floor, the top of the peephole should be angled downward. If instead the peephole is drilled straight in, the plug may fall out during firing.