Water piping is still specified in inches, at least in Italy. Also in Italy, when dealing with agricolture, forestry, and related services, non-SI surface unit

Water piping is still specified in inches, at least in Italy. Also in Italy, when dealing with agricolture, forestry, and related services, non-SI surface units are still commonly used, at leat in the north: https://it.wikipedia.org/wiki/Pertica_(unit%C3%A0_di_misura)#Superficie https://it.wikipedia.org/wiki/Pertica_(unit%C3%A0_di_misura)... https://it.wikipedia.org/wiki/Giornata_piemontese https://it.wikipedia.org/wiki/Giornata_piemontese https://it.wikipedia.org/wiki/Campo_(unit%C3%A0_di_misura) https://it.wikipedia.org/wiki/Campo_(unit%C3%A0_di_misura)