Hi, folks.
Referencing this diagram,
7-1-3.jpg
I can see that the water for the heater system flows out from the back of the water pump, through a big loop to the heater core and back, and then into the expansion tank via the small hose (Part #1) connected to the T-fitting (Part #5). That's where one short heater hose (Part #3) is attached.
My question is: what is the other heater hose (Part #3) connected to? It goes nowhere in the diagram. I assume it is also a "return line" since it connects to the same T-fitting, but where does it come from and what is it attached to?
Thanks,
Farrar