With the tubes removed, when priming the pump what is supposed to happen ?

I was expecting the fuel to come out of the fittings but all that happens is that I hear a noise like air is coming out when I pump ?

is that normal. ?

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1985 300D : the clean one 180k miles - Now passed onto my parents.
2000 E39 M5
2002 e46 330xit
1991 mustang notch (project)
1970 chevelle (project)