Milton for me. Fill the barrel, add Milton to streignth open taps and pump through, close taps and leave to stand for half an hour. Drain out and flush.
Do not notice any taint but I rarely drink water unless it has coffee added.
The excess Milton fluid can be used to wipe the fridge, wash basin, sink and shower out, thus sterilising it all.
Some of the site's I visit have serviced pitches so I also pour the Milton fluid through the hose pipe I use to connect the auto fill fitting in the barrel to the tap. That's this weekend's job ready for the trip north.
Paul.
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