i noticed at stratford my water pump seemed to be running more than usual. turn on the pump master switch and it clicks away until it pressurizes then stops.....everything normal after that. when we leave the van for the day or go to bed i turn off the main switch, dont want 70 liters of h2o in the van if it gets a leak , turn it back on next morning and it has to pressurize again. never noticed it do this before...maybe it did, maybe it didnt! the only thing thats been disturbed is the kitchen sink pipework and iv checked and re-checked that quite a few times, always clean and dry. does yours hold pressure for long.?