The quickest way to test for a leak in the water system is to put water in the fresh water tank, just enough for the pump to pick it up, and turn the pump on till it shuts off automatically and then turn the pump switch off . Leave the trailer for an hour or so and then go back in and turn the pump switch on again. The pump should not come on if the system is tight. If it comes on and how long it stays on will give you an indication of how big the leak is. If you can leave the trailer for several hours without the pump coming on when the switch is turned on the system is tight. At this point you are looking for a leak in the body. Other point could be the shower drain or the toilet seal. These are the the only point where water appears in volume above the floor.
Did they floor under the toilet? If so did they raise the seal to account for the rise?
If the hardwood was put down without removing the cabinets I would get it up ASAP to let the sub floor breath as mus as possible. Leaving it wet may require the complete floor be replaced because the panels turn to mush.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles