13 PLUMBING AND STEAMFITTING SUPPLIES-NAMELY, COCKS, JETS, METAL PIPES, PIPE FITTINGS, NOZZLES, FLUID CONTROL VALVES, [ TUBES FOR THE USE IN DISTILLING AND CONCENTRATING APPARATUS, ] EJECTORS, FLOOR DRAINS, [ FUME DUCTS, ] SINKS, SINK STRAINERS, AND TRAPS