Aquatru Carafe filters not even lasting half as long as advertised
I moved in with my mom after being laid off. Where she lives in Montreal has a severe lead problem in the pipes because the sewage system is so old, the city has tested and we have lead in her building for sure. Since then they have provided a Zero filter and done nothing else, which was 6 years ago. Anyway, I digress.
Partly as a thank you for letting me stay with her, and partly because I couldn't stand the Zero filter, I bought her an Aquatru Carafe. That was about a year ago.
The carafe has 3 filters (PRE, RO, and VOC). The PRE and VOC filters are rated for 1 year, or 300 gallons, and the RO for 2 years or 600 gallons.
What we've seen is that they don't even last half that time. In the 11 months of ownership, we've replaced the PRE and VOC filters twice, and the RO filter as well.
Is this normal? I know it's because we go through a lot of water. It's just the two of us here but we both exclusively drink water (and coffee and tea, but that's effectively just water for the purposes of this discussion). Roughly a gallon a day each would make sense, plus a bit extra for ex. cooking. But still, why advertise a year+ of use if the actual usage of a below-average household well surpasses their expected lifespan?
If I had known how short the actual lifespan of these filters are, combined with how expensive they are, I would have picked a different system.