Product review (3 stars): Quality Control lacking
First one we put in didn't fit quite right, couldn't get the closure to snap together. It also made the water taste like tap water, not nasty or chemically, just like it wasn't doing any good. In the meantime, our water valve broke and had to replace that, so I decided to try the 2nd filter in the pack. It fit well and makes the water taste much better. I don't get it, but there are an awful lot of reviews describing the same thing. EcoAqua, I'm a manufacturing instructor, my recommendation is to develop a solid quality control program to not let these bad cartridges slip by. You will continue to lose business until something changes.