Hello,
You still here？
You change your C-Complete replacement cartridge every year?

I read the ctm-02 box "change the disposable filter cartridge every 6 months or sooner if you observe a noticeable reduction in water flow rate."
This is not recommended 6 months.

I compared with below

https://www.3m.com.my/3M/en_MY/p/d/v000217068/
3M™ Aqua-Pure™ Under Sink Dedicated Faucet Water Filter Cartridge AP Easy C-Complete,
Filter Life 6 months
Replacement Interval 6.0 Month

https://www.3m.com.my/3M/en_MY/p/d/v000217064/
3M™ AP Easy Complete Drinking Water Filter System (Undersink)
Replacement Interval Up to 6 months

What is your opinion? If CTM-01, do you think also need change cartridge every 6 months, not 6-12 months?

Thank you.

Can? yes. recommended and safe? Not really. With no bacteria removal it is not really a direct drink. I would boil