Thanks for the suggestions re connecting mains direct to caravan. I did consider this but if there was a fault or something went wrong I would run the risk of flooding my caravan. I live on my own and use the camp showers so the barrel float system is a better option for me. I already spend way to much time worrying about leaks and potential damp (so far there isn’t any) so really don’t need to be worrying about a potential flood too 
