Just had an engineer come value our 2015 Bailey Unicorn Valencia and he found high readings along the floor behind & round the toilet up to the door the readings then go low also low about 6 inches away from walls of van and base of toilet. Floor not been wet on the top of the flooring unsure if from WC or C/H pipes but think more then likely the WC flush tank? Any ideas advice l presume we will have to get the toilet and C/H covers removed to find out where the leak if from and get it dried out my husband has removed cover from heating near bedroom door pipes don’t seem wet wood not marked but reading high we’ve put a heater on to see if dries out a bit could the wet be from filling the tank too much? Thanks Annie