Having made a trip to local big caravan suppliers, I found only one model in there which caters for only cold water like ours. It was sensibly priced but thought I would investigate further. I had a good luck at it and think solved the problem. The spout part seemed a bit loose and came easily out of the lower swivel section, when I fiddled with it. There is a black ring seal in there. I merely pushed the spout part firmly in and tested it several time, with water and manouvred the spout up and down and round, turning water on and off. No leaks! Just a big push. Showed to madam, seemed satisfied and we'll try it next on site.