Can't find drain plug for fresh water tank ..1990 HR TT ALSO DOES IT HAVE BYPASS VALVES SOMEWHERE FOR HOT WATER HEATER? Appreciate feed back. Just bought this. Great shape.
You may have to just remove the Anode rod to drain the tank, this is common on Suburban tanks. Many WH's of that period did not have a bypass valve so yo either need to add one, fill the WH with antifreeze or use air to just blow the system out.