Handy man book plumbing and heating encyclopedia
Handy Man Book of Plumbing and Heating Encyclopedia is a 1922 trade reference from Hardin-Lavin Co., a publisher of plumbing and heating guides, aimed at tradesmen and do-it-yourself fitters. The four pictures show metal plumbing fittings: a chrome wall spout with a flange, a pillar tap with a T-handle, a lever-operated valve, and a chrome P-trap under a basin, drawn in dense engraved hatching that a designer could borrow for vintage industrial line work.
