Why the pressure release valve must be installed directly on the boiler with a few fittings as possible and with no valve in between the components and the boiler?

The pressure release valve must be installed directly on the boiler to ensure immediate activation in case of overpressure, providing a direct path for steam or water to escape. Minimizing fittings and avoiding valves in between reduces the risk of leaks and obstructions that could impede the valve's function. This direct installation also ensures compliance with safety regulations and optimal performance of the safety system. Any delay or resistance in the release path could lead to catastrophic failure of the boiler.