First of all, large diameter layflat hose provides large amount of water and far more distance
The usage of LDLH is because the geometry and dynamics. If the diameter is double, the area will increase 4 times. This means when pressure reduce to half, the flow can be 4 times of the former. Meanwhile, the distance can increase 2 times.
For example, most of the firefighting bureaus in America regard 2.5 inch layflat hose as the standard. A 2.5 inch layflat hose can transfer water at 950L/min to 150 meters. But you have to increase the hose quantity if want larger flow. However, if you change the hose into 5 inch, the flow can be 3800L/min. While the distance can be 300 meters. Besides, you don’t have to increase the pump.
Lots of the firefighting bureaus realize not only earthquake can prove the value of LDLH. Because it can transfer large amount water to distance. More important, it effectively solve the water supply problem in outskirts. Thus, people gradually replace the old layflat hose with LDLH.
Besides firefighting bureau, insurance realizes the function of LDLH.
Many areas increase the interest rate of fire insurance. Besides, it offer credit to the people who change LDLH. On such occasion, the change of LDLH becomes more rapid. In some cases, the new credit will increase the insurance grade. Then reduce the compensation amount.