I don't see any issues of re-using the same filter, unless the filter type is of such that the casket can to be re-used. I have not seen such type though. In regards to the fuel line, yes just re torque to standards and check for any leak after. Once your fuel pump is running it will push our any air that maybe in the line. It is nothing different than when it is installed new.
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - Flying