Re: Cold Shower
I'm a Volunteer Fireman here in NC. How long you been a Firefighter. I would think that cold water would feel good. I went through all the certification and when I had to put on my gear plus the air pack in three minutes I looked at the instructor and said, "You got to be kidding!" I am almost 62 years old, I think I will stay outside and monitor the truck or direct traffic, leave the burning buildings to the young toughs.
But my shower does the same thing. I think the water mix being more cold than hot causes the water to cool faster. I don't take military showers unless I am using the system self-contained. I don't do that very often. But you might check the by-pass valve on the side of the water heater to make sure it is going totally into the heater. There usually is a low point drain valve in the same area. At least there is one on mine.