Product review (1 stars): BAD WATER COMING OUT OF BRAND NEW Water Sentinel filter(s)!!- No wonder they're cheaper!!!
I've mistakenly used Water Sentinel for three years and when the last order of 3 units arrived i installed the 1st filter, then i ran it for the prescribed time and noticed the reduced flow and worse yet when emptying the glasses of waste water i saw black flakes suspended in the water. I called TST Water the Manufacturer/Distributor,  they first claimed it was an aboration and told me to try all three new filters. All of the filters were the same low flow and black particles. WS swore that this was the first time they heard of black particles, then they said the flakes would disappear in days and then they personally assured me the the black particles were safe as the employees had all been drinking the WS filtered water.
I have an Reverse Osmosis system that feeds the refrig line and its checked for quality twice a year with no contaminates ever in 15 years.
So i put the original Water Sentinel filter back in and waited for my new GE brand filters to arrive as "Why would you use a filter that adds questionable contaminates into your domestic water?"
Today i took the 12 month old WS filter out and installed the GE, and what a miracle the GE water was perfectly clear flowing and the old WS filter had black particles in the water after 12 months of use!!

DON"T BUY WATER SENTINEL FILTERS UNLESS YOU WANT TO IDENTIFY THE BLACK PARTICLES AND CONSUME THEM FOR YEARS LIKE I HAVE!!