This is our annual testing of all hoses for the department. All hoses are inspected for undue wear or damage. They are then over pressured to ensure there are no leaks in the hoses themselves or in the connections. The hoses that do not pass are removed from service. The hoses that pass are then repacked in the trucks and put back in service.
This is part of the NFPA standards to ensure the hoses meet the standards for safety and pressure they were designed for.