Abstract: A pre-cooler system is provided and includes first and second pre-coolers, each of which is sized to handle demands of one downstream flow system, a piping system by which the first and second pre-coolers are receptive of compressed air from first and second turbine engines, respectively, and by which the first and second pre-coolers are both coupled to first and second downstream flow systems that are each configured to apply the demands of one downstream flow system to the first and second pre-coolers, a first pair of dual pressure regulator shut off valves (PRSOVs) disposed in parallel with each other and between the first turbine engine and the first downstream flow system, the first pair of dual PRSOVs being arranged in series with the first pre-cooler and a second pair of dual PRSOVs disposed in parallel with each other and between the second turbine engine and the second downstream flow system, the second pair of dual PRSOVs being arranged in series with the second pre-cooler.