We have a Pur water filter in our house. Before we drilled a new well the thing would plug up in a week. I mean PLUG up to the point where no water flowed through it at all. This was after it went through the water softner. Now, we have a new well, with much better water and the Pur cartridges last 2 months.
I would imagine it would work fine in the Airstream. When the Everpure water filter was damaged by the PO not winterizing, I installed a Culligan filter, for marine and RV use, that I bought from Lowes. It is a carbon/sediment filter. I would imagine, between the two filters, the water would be fine for drinking and making coffee. We usually carry bottled water with us when camping.
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283