What is the maximum working pressure recommended for water relay operations?

In water relay operations, the maximum working pressure recommended is 200 PSI. This pressure limit is established to ensure optimal performance while maintaining safety throughout the operation. At 200 PSI, fire apparatus can effectively move water over distances and through various connections without risking stress or potential failure in equipment.

Using a pressure higher than this recommendation can lead to excessive force on hoses and fittings, increasing the risk of ruptures or blowouts, which could compromise the efficacy of the operation, pose safety hazards to firefighters, and create challenges in maintaining consistent water supply to the firefighting scene. Therefore, keeping the pressure at 200 PSI strikes a balance between effectiveness in water delivery and the safety of personnel and equipment involved in the relay operations.