Product review (1 stars): Does not fit!  Water everywhere!  Refused refund!
They changed one of the notches where it fits into the fridge?  Now these things no longer work (previous orders had).  I tried to replace my old filter and no matter how hard I tried I could not get either one of these things to seal correctly.  There was water everywhere.  Finally I had to put the old filter back in.  They are both designed to fit LT-500P, 5231JA2002A.  WTF!!!!!!!  I will NEVER buy Water Sentinel again!