Product review (4 stars): fix filter fit problem
Here is the deal if this filter doesn't fit. I found that the last filter I removed left behind a small plastic adapter bushing in the receptacle for the filter. You can't reach it but I found that a 5/16 masonry drill taped onto a rod or socket extension extracted it easily. Then the new filter fit in. Don't try this if you are not mechanical or you may wreck the filter socket.