Product review (1 stars): Dirty Filter
I purchased the two-pack Water Sentinel refrigerator filter last year as backup.  I finally needed to replace my refrigerator filter for my Samsung refrigerator.  Upon opening the box, I noticed a black powder all over the filter.  I checked the 2nd filter and the same black powder was on the filter. The "sanitary" end cap did not properly seal the filter and did not prevent the black powder from entering the filter.  I cleaned the black powder off the filter, installed it into my refrigerator, and hoped for the best.  I let the water run for 1 min and black water appeared in my cup.  The water kept getting darker the longer I ran the water.  The return period has passed and the 90 day money back guarantee has passed as well.  I am appalled this filter passed through their quality department.  Do yourself a favor and DO NOT BUY THIS FILTER!!