Dear Alfie,
We just spoke on the phone where I placed my standard order for replacement ARO and ADI filters for our 36 YEAR OLD PLATINUM 90 RODI PURIFICATION SYSTEM !
With a few tweaks on the unit over the years, we have enjoyed uninterrupted service and the finest drinking water available.
Of note, Milwaukee went through a terrible cryptosporidium outbreak some years ago. We had no issues using the water from our Aquathin unit for drinking and cooking. No water boiling, etc..