Ok, Yaffa, now I'm curious!  I've got to get that pressure gauge back and play
around some more.  What you found was what I expected but didn't find.  And of
course I can't find the notes I made at the time either.  What I remember is
that there was some disparity between different pumps but that it seemed to be
minor.

For single pumping I just used the rubber stopper in the breast shield; for
double I put the stopper in one and my personal non-lactating breast in the
other.  I only did it with the bottles empty.

I'd rather believe your results; I'll have to try it again when I can get a
gauge.

Becky Krumwiede, RN, IBCLC
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