[JRTJH]

Your trailer will likely have a "two valve bypass system". It will look something like this photo. Some "entry level trailers" from the late 90's and early 00's did not come with a water heater bypass kit installed. Depending on what a previous owner may have installed or "skipped" your trailer may not have a bypass at all.

Here's what you should find if there's a 2 valve system. If it's a 1 valve system, you'll only find a valve on the cold water inlet connection which is on the lower connection.