RV Repair: I have a 2000 Georgie Boy..., georgie boy landau, water supply line

Question
I have a 2000 Georgie Boy Landau 35' Class A with one slide.

Question:  I recently hooked up the fresh water supply line, turned on the water and checked all the faucets to see if they were working, etc.

Suddenly the floor between the shower and the water closet buckled up and caused the water closet door to bind.  Outside water was pouring from the center of the body underneath.  I turned off the water, the floor recovered but not completely.  It is still about 1/2" high and neither the shower or water closet door will latch.  Any idea what might have happened?

This was the first use after winterizing back in the fall.  The temp. when the problem ocurred was 48 degrees.

        Thanks

Answer
You either broke a supply line by freezing or one of the fittings came loose and was leaking.  In any event, I would have an RV tach take a look and get the problem fixed.
As for the floor, my guess is that the plywood subfloor de-laminated and buckled.  Given there is probably vinyl flooring over it, the flooring will have to come up, the spot cut out and replaced.