It will also depend alot on the quality of your water going in which of course is a dice roll. When I cleaned out my 4 filters on my old system the first one usually had a shrimp or 2 in it and the water was brown brown brown dirty with silt and vegetative matter and worse after rains.+ maintenance + running costs
They confirmed that the ujeta first is just activated carbon + high-tech membrane. The membrane pore size is key I guess.
I started looking for similar ultrafiltration filters, found a few, they seem to be lost in the plethora of filters out there.
They have some with backwash valve which helps clean the membrane and extend lifetime of filter.
Will update with more findings...
I brought a Berkey down the last time I came from the states,worth it's weight in gold. I was getting sick constantly from the water in botelons and now I put tap water through the Berkey and haven't gotten sick once in over a year.Do yourself a favor and research the Big Berkey. They are favored by preppers, that should tell you something right there. It's a counter top gravity system that removes 99.9999% of pathogens and viruses. Unless you're going to spend a few thousand dollars for an inline system, a Big Berkey is the best you'll find.
Seriously, how many gallons do you think that dinky little faucet thing will purify? You get what you pay for.