Our coach has a water filter in the wet bay, to help ensure clean water:

We recently changed the filter while sanitizing the water systems; here’s the dirty one and a clean one:

That was actually the wrong filter, so I got the correct one:

For drinking water, one filter doesn’t really cut it with some campground water supplies, though. So I purchased a Clearsource Ultra three-stage water filter system, with a 5 micron rust filter, a 0.5 micron bacteria filter, and a virus-guard filter:

Our coach now has five filters between the water supply and our fridge water dispenser: those three, the aforementioned built-in filter, and the filter in the fridge.

I also bought a potable water hose to go between the tap and filters.

When first hooking up the hose and filter, I flushed them out by draining directly into the sewer:

Then hooked them up to our coach:

Ideally I’d like internally-mounted filters, and perhaps a water softener. One day I might arrange that, using the small bay on the other side of the coach. But for now, I’ll deal with the external filter unit; just another part of setting up at a site. Worth it for cleaner-tasting water.