For reusing pump parts:  I like the idea of absurd overkill, so I use hot
soapy water, then a bleach soak (a healthy dollop of bleach in a bowl of
water) for at least a minute, then I autoclave... in a pressure cooker.

According to the temp/pressure guidelines in Medela's pump info booklet,
hospital sterilization is 15 min at 250 degrees F for 15 min at 15 pounds
of pressure.  Well, guess what!  A plain old kitchen pressure cooker
operates at 250 degrees, 15 pounds.

I bought a pressure cooker just for my pump parts ($30 to $50, depending on
size) so no one would find bits of potato on the flanges.  I use a
vegetable strainer inside to keep the parts out of the boiling water, and
there are *no* mineral deposits, even though we have really hard water.
Then I "cook" for 20 min rather than 15.

So my procedure is overkill both by adding a bleach soak and by cooking
longer than required.  If that's not enough to kill litigation concerns
right along with germs, then I'm ready to move to a more common sense
country.

Diane Wiessinger, MS, IBCLC, LLLL  Ithaca, NY