How do you check the ware through the peephole when using a downdraft vent? The instructions state to leave the peephole plugs in.
The plugs are inserted to form a negative pressure inside the kiln when using a downdraft vent. Without that negative pressure, fumes could exit the kiln through the smallest brick crevice. But it is okay to remove the peephole plugs occasionally to look at witness cones.
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