Water leak filling underbelly

We had our VRK272  at home this weekend preparing to take it out for its maiden voyage while we waited for our dealership to get a replacement bin door that was warped.  Hooked up water to camper (city connection), had a water pressure regulator on at spigot, turned on water.  Wanted to make sure that anode rod in hot water heater didn't leak.  Well it didn't leak, not sure if there's a bypass behind the water heater that I need to turn off.  Anyway, all the faucets had water come out when we turned them on, nothing leaked from the pipes under sinks or shower.  Turned off all faucets, but could faintly still hear water running.  Went outside and saw that the underbelly membrane was sagging.  Somewhere under the rig some connection is not right, so I did my best to get the water out of the underbelly.

So, back to the dealership today vice camping.  What really upsets me is that there is no way the dealership PDIed the water system without finding this.  At least the replacement door is in for them to fix.

Maybe we'll get to camp in this thing before the end of this year.