Hard suction firefighting hose, is usually a rubber-covered, semi-rigid hose with internal metal reinforcements. It is used to suck water out of unpressurized sources, such as ponds or rivers, by means of a vacuum. Suction hose ranges in nominal inside diameter from 1.5 to 6.0 inches (64 to 152 mm). The standard length is 10 feet (3.05 m). Custom lengths available; please call to order.