Message Forums

Well caravans either have a pressure switch to operate the water pump or micro-switches under each tap. I have never owned a caravan with micro-switches so can't comment but from what I can gather they are quite difficult to access. Both micro-switches or pressure switch operates the 12 volt water pump when the pressure drops in the water system ie. when you open a tap. The pressure switch is usually located under one of the seats usually the same side as the hot water tank which is white and has a small dial on the top which adjusts the pressure. I usually undo the jubilee clips on the pipes from each side and put some paper towel under just to soak up the drops of remaining water so the pressure switch doesn't freeze. You have to remember to re-connect the pipes though either side once it is drained fully otherwise if you forget you could have a flood. I have never blown out any of the pipes in seven years of caravanning so it's not actually a must that you need to do. See the link just to show what the pressure switch actually looks like and to indicate where the pipes fit either end of the round spigots.

http://www.horizonleisure.co.uk/whale-pressure-switch.html?___store=default