"JIMMIE" wrote in message
What I dont understand id that it can leak some and still pass the
test. I dont remember what the requirements were but it didnt make
sense to me that it was OK for it to leak down any at all.

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Molecules in air are smaller than water molecules, thus air can leak where
water will not. Just as air can pass through a plastic storage bag. That
is why you get freezer burn after a time.