Product review (1 stars): Poor quality and maybe a knockoff - is it really filtering the lead out?
I have replaced the filter cartridge 3 or 4 times in the past with new cartridges from other supplier with no issues.  This time was different - the filter appears different and did not work properly.  Flow was very restricted making it useless.  It makes one wonder if it is a cheap knockoff.  If that's the case, is it really filtering the lead out?  It's important for Amazon to prevent health-related knockoffs from making it to market - they provided a refund but it's more important to prevent them from appearing in the first place.