"Richard J Kinch" wrote in message
. ..
Harold and Susan Vordos writes:

Does anyone have a source for food grade O rings?

It is a matter of species, of which nitrile and EPDM are approved. There
is no "gradient" to make any given item food "grade", as if it were a
matter of a continuous variable like purity.

http://www.harborfreight.com/cpi/cta...emnumber=31677

While your comments are somewhat on target, there is apparently a prescribed
procedure and given components that are incorporated that constitute food
grade. This link alludes to the idea. They offer food grade rubber in
sheet form, but not O rings.

http://www.chamberlinrubber.com:80/F...e_p_15 7.html

Harold