water heater replacement

[jebsr1]

Hi All
I have a 2004 class A gulfstream Ultra supreme. On my last trip we were sitting by the fire. all of a sudden water started coming out of the bottom tube right below the water heater. I pulled the relief value to make sure it wasn't something else. it wasn't under any pressure
When I got home and started pulling it apart. My Question is how do I get to the inlet/outlet water tube. I'm thinking since its below the flooring. I need to put a hole or pull out a wall somehow. Any help would be appreciated.

Thanks in advance,
Jim