Metal pipe couplings and joints; Metal self-aligning demountable snap fasteners consisting of press fasteners and press studs for use in attaching panels, hatches, floors and furniture in boats, motor vehicles, trains, aircraft and buildings; Metal expansion joints for piping and ducting; Grease nipples; Metal pre-rinse, wash down spray nozzles for commercial and industrial use; Water treatment equipment, namely, metal water storage basins for collecting and storing water; Manifolds of metal ...