Good job I did not fill up the water tank to capacity, the sink tap failed and the pump decided to pump out all the water, luckily the towels soaked up a great deal of the water. A lesson learnt , turn off the pump when not in. If I was in the motorhome I would have heard the pump running and avoided a big clean up. Pressure systems are ok but possibly the micro switch systems may have avoided this problem as the pump only runs on request. Any thoughts?