When referring to hose, what does the L stand for in LDH?

The term LDH stands for Large Diameter Hose. This designation is used to describe hoses that have a larger diameter compared to standard hoses, which typically range from 1.5 to 2.5 inches. Large Diameter Hose is generally considered to be 3 inches or larger and is primarily utilized in firefighting for its ability to deliver a high volume of water efficiently.

Using LDH allows fire departments to rapidly supply water to fire suppression activities, providing a more effective response to larger fires or operations that require substantial water flow. The significant capacity of Large Diameter Hose makes it essential for situations that demand quick and continuous water supply, such as in rural fire operations or when dealing with high-rise fires.

The other terms do not accurately describe the characteristics of LDH, which is specifically known for its large size and capacity in firefighting applications.