[time-nuts] OT Euro/US plumbing was 14 tpi UNS die

[J. Forster]

Soldered copper is certainly not allowed for gas. There are special,
flexible copper and fitting systems are, but not everywhere.

-John

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[snip]
> Steel pipe, often it seems referred to as "gas barrel" even if not being
> used for gas, is still common in industrial situations but copper is the
> norm for gas and water in domestic situations with pipe sizes varying to
> suit flow and equipment fittings. [snip]