What should be done to prevent water from freezing inside the hose in extreme cold conditions?

Allowing a constant low flow of water is an effective strategy to prevent water from freezing inside the hose under extreme cold conditions. This flow helps to maintain a movement of water, which reduces the chance for it to sit stagnant and subsequently freeze. When water is kept in motion, it remains at a temperature less conducive to freezing because the dynamic energy of the flowing water helps to disperse cold evenly rather than allowing it to settle and chill in one place.

This method is commonly used in firefighting scenarios where hoses may be exposed to freezing temperatures. Maintaining a low flow creates a constant circulation that can help keep the water temperature elevated. Overall, this practice is practical and often necessary to ensure that firefighting equipment remains functional in challenging weather conditions.