Hi all just started getting the motorhome ready for the upcoming season.powered the van up on 240v cleaned all the water system, switched the fridge on and it seemed to take an age to get even chilled went out side and noticed water dripping from underneath the wheel arch, there is a drain hose for something one side and it was leaking from the other side as well, switched over to gas and the leak virtually stopped, any ideas. Ps van stood since octobet