Piping, from the nozzle to the first flame arrester, shall be limited to a maximum bore of 15 mm.
5.3.5.2 All parts through which fuel vapour flows and the associated seals shall be tested in accordance with
6.1.6 and there shall be no catastrophic failure.
5.3.5.3 Where a vapour pump is present within the metering pump/dispenser the maximum operating pressure
within the piping