I live in a country with world’s cleanest tap water, so none.
I installed a RO system when I moved into my house
I just drink the tap water. It’s ok. Letting it sit for a few hours to let the chlorine escape helps the taste. I haven’t thought those pitchers to be any good but who knows. If I really wanted to filter the water, I’d look at an MSR gravity filter or similar.
None, we have potable water here.
An absurd amalgamation of a 4 part while house filter, a softener, and an under sink reverse osmosis thing for drinking water.
The water here has enough dissolved solids in it that before I put in that stuff if the pipes got a pinhole leak in them it would seal itself within a couple hours at the expense of everything having a white crust on it.
