Product review (3 stars): Good specs but wrong size O ring. As many reviews have stated these leak like crazy. But are NSF 53.
Good specs but wrong O ring. If you install and walk away you will drop gallons under your fridge. For some people this can be a HUGE costly problem. The large outer O ring (that you can see in picture) is too small and doesn't seal. Unfortunately I already threw away my OEM filter but was lucky to have a large O ring kit. I found one that works although it makes it very hard to get in and out. But here's the good part- if you can believe the packaging these are "tested according to NSF 42 and 53 standards". Basically every other filter online is 42 only. 42 is chlorine and dirt. 53 includes cysts and heavy metals and other things. Some other say something like 'components are tested using NSF 53' but then the filter itself says specifically 'NSF 42 only'. SO.... what I would do is buy this filter and take O ring off OEM or your last non-leaking filter. O ring is easy to take off using a toothpick. Once off you'll see there is a HUGE difference in the Oring. It's really a shame the manufacturer doesn't read the reviews and/or doesn't fix this.