My new baby!!

I found it!! A secret door on the outside to the left of the hwh

If your hot water heater is on the same side as your kitchen sink, it will most likely be located in the cabinet under the sink near the floor off to the right.

In my first C it was so far off to the right of the kitchen cabine it was under the stove out of sight! Had to have a service tech at a dealership to show me that one. :R

The brochure lists it so I just need to find it. It's so easy in my trailer at the bottom of the closet.

It's possible (though doubtful) that it never had a water heater bypass. They aren't quite universal.

It would be someplace near the water heater--possibly on or right next to it, possibly somewhere in the plumbing between it and the nearest fixture. On my (non-Gulfstream) class C, it's underneath one of the lower drawers in the kitchen; I have to remove the drawer to get access to it.

The bypass on my 2004 GS was outside in a compartment door where water tank was located.
It did not work very well to stop from using a lot of antifreeze when winterizing. I ended up putting a valve kit on heater.

The water heater bypass is more than likely on the back of the water heater itself. You may have to remove a panel inside the coach to get to the back of it