This is where the water heater bypass was in my '12 32A. It probably looks like it ties the hot and cold water together because this is where the water enters the water heater for heating. The valve should be on a "T", one way going into the water heater, and another way going to where the line comes out of the water heater. If I remember correctly, mine also had a valve at the connection where the water comes out of the water heater to stop water from back filling into the water heater.
Dewey & Sharon
Southern Maryland suburbs of DC
2015 Tiffin Allegro Bus 45LP