crx fuel lines

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D See 2

Senior Member
okay, i just got the zex booster fuel pump for my 90 honda crx si. i found three fuel lines going into my fuel tank. one is heavier than the other two. the fuel pump goes inline with the fuel supply line. anyone know or have a diagram of this fuel system or know which is which? thanks.
Fuel pump - two way valve - select your model, year, trim, transmission, system/component (fuel pump - two way valve)

(I'm a 'tard I can't seem to get the link posted correctly - sorry)