Patent ID: 7503205

Claim:
A redundant vacuum source system for generating a vacuum level in a fuel-handling component interstitial space to monitor for leaks, comprising: a fuel-handling component surrounded by the fuel-handing component interstitial space; a first vacuum level source coupled to an input of a first control valve; a second vacuum level source coupled to an input of a second control valve; a common vacuum conduit coupled to an output of both the first control valve and the second control valve, wherein the common vacuum conduit is coupled to the fuel-handling component interstitial space; and a control system coupled to the first and second control valves, to open only one of either the first control valve or the second control valve so that only either the first vacuum level source or the second vacuum level source is coupled to the fuel-handling component interstitial space to generate a vacuum level in the fuel-handling component interstitial space.