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Rugged, Flexible LDH Fire Hose to Fight Fire Effectively

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.

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LDH Hose Advantages

  • LDH hose are generally longer than smaller diameter hose. Standard lengths are typically 100 feet. Short lengths or pony lengths are used for hydrant hook-ups to charge pumper units.
  • Large diameter fire hoses feature rugged construction. Manufacturing techniques include the extrusion of nitrile rubber in a thru-the-weave process, or LDH hoses may be manufactured by laminating the nitrile rubber cover and liner. In either case the entire length of the LDH hose is seamless.
  • LDH Hose is heavier than smaller diameter hose to deliver more water volume over longer distances.

Large Diameter Hose Delivers Big Water at the Scene

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.

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