Product review (1 stars): Why did they change it?
I had purchased several of these and they always worked. I ordered it recently and it doesn't fit. OK, maybe it was a manufacturing defect, so I ordered another. Nope! It is wrong again. The fitting is about 1/8" longer than it used to be. It no longer clears the the mounting guides to move it into place and lock it. I even ordered the one by Aqua Pure for $15 more. It has the same problem. Did they change the standard?

Yes, I examined the mount in the refrigerator. There is nothing bent or stuck in it to keep it from being inserted that final 1/8".