Helps cut, ream, solder, braze, fuse, solvent weld, groove, thread pipe and pressfittings using measuring tools, pipe cutters, torches, beveling machines, reamers, bolts, screws, fittings, alloys, gaskets, solvent cement, fusing machine, groove and pipe-threading machines. Lays-out, positions, aligns, fits, tack-welds, assembles and installs valves, hangers, pipe and fittings composed of metals such as iron, steel, aluminum, brass, copper and nonmetals such as fiberglass and plastic using hand tools, roustabouts, grasshoppers, come-alongs, chin falls and power tools.