Product review (1 stars): I do not recommend buying this from Amazon
I usually keep one extra at my house so when mine current one expires.  I purchased this one directly from Amazon on Sept 21 2015 and installed it on Jan 14 2016.  Previously I've purchased from third party sellers.

There is something wrong with this one. The water tastes horrible and when I attempt to exchange it I'm told I can't .  Needless to say, I'm not fond of being stuck with a defective product.

I recommend not buying this at Amazon because
1. You only have 30days to return
2. I received a defective one