Most of the time the lines will clog with rust and restrict the pressure.
Galvanized water supply lines.
When it was invented galvanized pipe was an alternative to lead pipe for water supply lines.
This is because the coating prevents water from coming into contact with the galvanized steel host pipe.
Galvanized piping was commonly installed in homes built before 1960.
To identify the type of material take a look at the water piping where it comes into the basement before the first shutoff valve which should be located right before the water meter.
Galvanized pipes are steel pipes that have been dipped in a protective zinc coating to prevent corrosion and rust.
Galvanized water supply the water supply piping is what brings water from the street to the house.
This home has galvanized water lines in it still.
So this is a process you can try.