On Nov 9, 10:25*am, fred wrote:
In article
,
harry writes

On Nov 8, 12:28 pm, fred wrote:

And finally, just to clarify, can you perhaps explain what you meant by
"22mm is the nominal bore size." in your original reply, it doesn't
appear to relate to either 22mm domestic copper or 25mm domestic MDPE
metric pipe sizes. Just a sentence will do, own words preferred, no need
for links thanks.

Of course not. That's what nominal means.
The pipe commonly available for domestic applications is just a small
part of a much larger range. Read the link.

The clarification I am looking for is how a pipe with a bore of 22mm can
also have an o/d of 22mm as you seem to imply?
--
fred
it's a ba-na-na . . . .

Bores are nominal. ODs are exact.
Didn't you read the link?
http://dictionary.reference.com/browse/nominal?s=b