Hi
I would like a RO system but in a camper I think it takes too long, with too much power, too much bulk and cost is not small. If I wanted to park for weeks by a remote beach then a very good idea though.
We had blind faith in a three stage Pre-Mac filter while my wife spent about two weeks on the loo in Southern Morocco. We thought she'd eaten something. We later discovered that more than likely the over extracted and slightly saline ground water was probably the cause. AFAIK you would need RO to get any degree of saline out? The locals all used bottled water in M'Hamid for drinking as far as we saw and were told. There was a fresh water tanker delivery every now again for the town, but filling our camper tank with which we would shower etc would not go down very well. Similarly, for somewhere with so little water, just discarding the waste that RO produces would be fairly insensitive.
A high content of limestone deposit possibly upsets the same way according to a more recent discussion, which was solved by a small pore size ceramic filter.
In our last camper we had about 270l in one tank. This was always tap water, but that didn't always mean clean!
Katadyn Micro Pur Forte was added to every fill (50,000 litres worth in powder form is only a mug sized tub with a reasonable lifespan). Even if chlorinated drinking water was added to the tank every time, chlorine evaporates once out of the mains system, and to some extent dregs will always be left from the last fill, so the Micro Pur I think maintained a clean tank. Not every country has the strength written on a liquid bleach bottle to know how much to add even if it's fresh and hasn't been warm. Bleach tablets are better than liquid, but Micro Pur Forte is better again!
We then showered and cooked with whatever we'd filled with, and three stage filtered drinking only. The coarse filter in the vid attached was used only when "tap" water wasn't really. We could have filled with several pre-filters from a stream for instance but never needed to. If we were remote enough to need to do that occasionally then I think creating a volume to regularly shower from is a bit daft, and filtering/purifying enough to drink from pretty much any level of pollution is doable more easily at smaller scale. eg millbank bag then MSR Guardian then maybe a Brita jug.
Next camper I don't think we'd have iodene in the filter system due to coincidental (?) thyroid problems on return, I think we'd keep a separate water store untouched for "just in case", we'd have the facility to fill a drinking water tank from bought bottled water if it was occasionally needed, and continue with filtered drinking plus Micro Pur throughout.
IIRC Milton tablets can be used to lightly chlorinate for drinking at 1 tablet per 100 litres if it's already clean, maintenance only.
Whatever you treat with, if you do, you need to know roughly how much water you are putting in for dosage.
Next time I'm not sure what filter to use yet though. Maybe a Seagull each for kitchen and bathroom, and an MSR Guardian as backup.
Also, pre-filtering mains water before it gets into your tank will not happen in Europe unless you find somewhere with your own tap. Campsites and campervan stopovers will have a queue on departure as it is. A 40 minute fill will have you forcibly ejected
