We have a 10 year old Swift Sundance 582PR, been quite lucky thus far with no massive problems. I decided to do the annual water system clean out with Puriclean, filled up the fresh tank and turned on the water pump to fill the pipes. Water came out of the taps OK but then I noticed a massive amount of water falling from the underside of the van and then saw it welling up onto the floor next to the shower room. Luckily it's going in next Thursday for a hab check so hopefully it will be sorted out before we go away in 6 weeks. Any ideas what could be causing this? We did think it might be a split hose under the wash room but then the water would simply drain away and not apparently seep upwards unless of course there was a blockage.