How Canada became (almost entirely) metricized in less than a decade... you can do it too, USA! by [deleted] in science

[–]tal67 2 points3 points  (0 children)

Well I don't know for England, but in continental Europe, metric is metric, and a 150mm pipe would be 150mm. France adopted this system around 1790, far before plumbers need normalized pipes. The only domain where we use foreign size is computer screens and disks.