What is the minimum requirement for hard suction hose on a mobile water supply apparatus with a fire pump?

The minimum requirement for hard suction hose on a mobile water supply apparatus with a fire pump is established to ensure that the apparatus can effectively draft water from a static source, such as a pond or a reservoir, where the distance between the fire pump and the water source must be adequate for successful operation.

Twenty feet (6 meters) is the standard length specified in various fire service standards and guidelines. This length is considered sufficient to reach most nearby static water sources while allowing for necessary flexibility in maneuvering the apparatus to position it effectively. While longer lengths are available and may be used for specific situations, the minimum requirement is grounded in ensuring a balance between operational needs and the practicality of storage and handling on the vehicle.

In contrast, shorter lengths may not provide enough reach to water sources in various real-world scenarios, which could hinder the fire department's ability to draft effectively. Similarly, greater lengths could introduce complications in terms of weight, handling, and storage within the mobile apparatus. Thus, the choice of twenty feet not only aligns with regulatory standards but also takes into account common operational needs.