[pmontra]

Gas and water pipes are often in inches too (Italy) probably because it's an old and critical infrastructure and nobody wants to risk mistakes by trying to fit a 1 inch pipe with a 25 mm one, or 1 1/4" with a 32 mm. Close but not close enough.

However I guess that even American engines are measured in liters or cc, cubic centimeters.

[skissane]

> Gas and water pipes are often in inches too (Italy)

English inches (now 25.4 mm) or Italian inches? (“once”/“oncia”-varied in definition between different parts of Italy, but was always at least a fraction more or less than the English one)

[pmontra]

English inches.

I'm not sure I ever heard the Italian word oncia as a unit of length. I thought it was a translation of the imperial unit of weight, ounce. However all is possible in the world of the old semi forgotten traditional units.

[skissane]

My Italian begins and ends with ciao. I’m just going by what Wikipedia says on the topic:

https://en.m.wikipedia.org/wiki/Italian_units_of_measurement

[pmontra]

Thank you. It seems that it was a customary unit in my area of the country as well. Never heard about it.