Today, virtually every fire department uses large diameter fire hose to move water efficiently. LDH hose is flexible hose designed for the purpose of moving water between a pressurized water source and a pump that is supplying attack lines. Large diameter hoses may also be used to relay water from one pumper to another over a long distance. Fire hose is generally considered to be large diameter hose when its interior diameter exceeds 3½ inches. Fire departments in the United States typically use LDH with diameters of 4, 5 or 6 inches.Read More
LDH fire hose is big-flow, low-pressure hose, which is both its defining feature and the reason for its popularity. Because friction loss in large diameter fire hoses is entirely dependent upon flow, not pressure, the more capacity (GPM) a hose can carry, the less force (PSI) is needed for the delivery.
This accounts for the ability of LDH fire hoses to deliver greater water volume over greater distances, with less friction loss than smaller diameter hose. With LDH hoses on your engines, your firefighters can deliver big water to the fire scene with less labor and less equipment.Read Less