Product review (1 stars): Not tested rigorously, not Whirlpool-approved
Unlike the Everydrop brand, this Waterdrop filter is not certified by Whirlpool. It appears to be an inferior quality substitute. I came to the conclusion by going to whirlpool.com / products / water filters. They then redirect you to everydropwater.com. If I enter my model number 4396508, or the replacement model number EDR5RXD1, and you can then read the Performance Data Sheets, which say that this filter model has been tested by NSF International against NSF/ANSI standards 42, 53, 401, and CSA B483.1, and list contaminant reduction specs for chlorine, asbestos, lead, mercury, benzene, DEET, BPA, and a number of other chemicals. Meanwhile, if you look for testing specs for this Waterdrop filter, you find no table of test results, only a picture that says tested against NSF/ANSI 42, and "reduces chlorine". This strongly suggests to me that the Waterdrop is a lower quality knockoff of the Whirlpool-approved Everydrop. I'm going to pay more and buy Everydrop.