Hi has anyone used one of the above from a normal garden tap supply? The reason I'm asking is clark online manual states that it needs 5 gallons pm inlet supply and I don't know of any garden taps in my area that will produce that amount, I've spoken to clark who have said it will run ok of a garden tap but I don't want to pay out £500 for the machine on the word of someone on the other end of a phone when they are saying different in there manual