In jacketed fire hose, what function does the outer jacket serve?

In the context of jacketed fire hose, the outer jacket plays a crucial role in enhancing the overall strength and durability of the hose. The jacket is typically made from materials such as synthetic fibers that provide the hose with the ability to withstand high water pressure without bursting or failing. This increased strength is essential for firefighting operations where hoses are subjected to substantial forces while delivering water to extinguish fires.

While the other functions mentioned, like waterproofing or surface texture, can be relevant to hose design, the primary purpose of the outer jacket is to ensure that the hose can handle the demanding conditions it faces in firefighting scenarios. The jacket also offers some level of protection against abrasion and environmental damage, further contributing to the hose's longevity and reliability during use.