DIYbanter - View Single Post - 22mm compression fittings: spanners required?

Dave

wrote:
On 2 May,
Dave wrote:

Half inch is near enough to 12.5 mm. 2 1/2 mm smaller than 15 mm

22mm and 3/4" ain't.

3/4 inch is near enough to 19 mm. 3 mm smaller.

Metric size is OD imperial is ID Difference is approx 2X wall thickness.

Ah! didn't realise you were talking pipe sizes, I thought the subject
was spanner jaw size.

Dave