Bacharach Draftrite [0013-3001] Pocket-Sized Manometer, +0.05 to -0.25 inH2O of Water. The Bacharach Draftrite® Draft Gauge is a pocket-sized manometer that enables contractors and technicians to quickly and accurately measure draft. Available in two different ranges, the Draftrite® is suitable for many applications, including checking flue pipes, chimneys, draft regulators, basement ventilation and more.