In article ,
Doug Miller wrote:
In article
munications,
(Robert Bonomi) wrote:

Plumbing stuff is specced by inside diameter.

Incorrect.

IS CORRECT, _IN_THE_ORIGINAL_CONTEXT_ -- "fittings", not "Pipe"

O.D. is whatever the manufacturer feels like.

Incorrect.

IS CORRECT, _IN_THE_ORIGINAL_CONTEXT_ -- "fittings", not "Pipe"

Pipe is specified by OD; the ID is determined by the nominal OD and the wall
thickness.

Yes, _Pipe_ is specified by OD. ID varies.

*FITTINGS* -- the 'stuff' under discussion -- which pipe goes into, *ARE*
sized by the I.D. They -have- to be, to ensure a proper fit with the
'same size name' pipe (OD. speirfication) The OD of such fittings is
*NOT* critical -- it doesn't have to match up to anything else -- and,
therefore *CAN*BE* 'whatever the manufacturer d*mn well pleases"