This cast bronze tapered thread closure plug is used in caulk ferrule cleanouts that have tapered threads. It can be equipped with one of two circular frames with secured covers. Fig. 4436 is designed for face-of-wall installation in tile, masonry, or dry wall construction. It is usually installed on an opening in the finished wall. Fig. 4437 is intended for flush-with-wall installation in plaster or wet wall construction and is installed during the wall construction. Both are fitted with anchoring lugs that secure the frame to the wall.
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