Buying new obviously would solve the issue, but wherever possible I've refurbed on this build and brass fittings should in principle never wear out given normal usage? Plus I was unsure as to whether new would have the same issues, metal on metal opposed to rubber ended needle and what working pressures these valves are tested to, given the pressure created in the fuel tank in warmer weather? Or should the fuel cock always be closed at the end of each journey?
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