Aircraft Spruce sells MIL 6000 hose but says "not recommended for fuel". I don't see that anywhere else including the MIL 6000 specs. I certainly don't recall any restriction against fuel use. The application is for couplings between AN840 hose nipples and beaded aluminum tubes which are hose clamped. These are on the low pressure (inlet) side of the system. Does anyone know why ACS has this statement on their website?