Cast-iron handwheel gas-line shutoff valve in the northwest corner of the second floor of the Hoffmann-Hayman factory, photographed on 5 January 2025 — a heavily oxidized vertical iron riser pipe runs floor-to-ceiling against the wall corner, and a horizontal valve body is clamped to the riser by a bolted bracket (two visible through-bolts gripping the riser) projecting a short horizontal stub out into the room and terminating in a polished brass/bronze hex union nut and a four-spoke cast-iron round handwheel painted rust-red, the union nut sitting between the valve body and the handwheel-side connection so the valve can be unscrewed for service; the assembly is a typical period plant-services branch shutoff sitting in the corner where two whitewashed plaster-over-masonry walls meet, both wall faces carrying a fine, regular horizontal ribbing/banding texture (consistent with either scored scratch-coat plaster or impressions of underlying lath showing through thin whitewash) with a patch of bare red-brick masonry exposed in the upper right corner where the whitewash has worn or fallen away — same kind of whitewashed-brick second-floor interior surface that surrounds the building's other upstairs plant-services hardware
