Product review (5 stars): Compatible with Samsung RF263BEAESR refrigerator
I was concerned because earlier this week, I tried a Waterfall version that also claimed compatibility with our fridge.  When I installed it, it created a waterfall... it was returned for a refund.  I thought that the disaster was because the top of the filter was very different than the one I was replacing, (Water Filter Tree Purity WLF-20B, also compatible with da20-00020B).  As you can see in the attached photo, the connection on top looks very different between the two and I was hesitant to try the Pure Line as it also has the open top.  However, tried to install it today and it has not leaked and seems to fit.