I couldn't figure out how to drain my water heater yesterday when I put my coach in it's storage barn. I was trying to do it from the water compatment with those valves, but I think I only drained the fresh water tank. After I got home it dawned on me that the drain valve is probably in the water heater compartment. My coach is stored about 50 miles away so I can't just run out and check. Is that correct? Is there a special procedure needed to drain the hot water tank?

I'm going to go back on Tuesday and see if I can figure it out. I don't want crud to grow in the tank while it's stored for the next 4 weeks.

If the coach has a traditional water heater, you will drain it from the outside drain plug on the bottom of tank. This is located behind the water heater access door on the outside of the coach. If your coach has an Auqa Hot or Hydra hot there is a drain for the line. Get the owners manual and it will show you where the valve is at.

Thanks for the info. I have a regular hot water heater, no hydro-hot. I don't have any manuals, but I'll look for the drain plug when I go back next week. I read some heaters have an annode that needs to be replaced from time to time, is that located on the drain plug itself??

my HWH does not have a drain plug. I pull the anode rod and open the relief valve to let it drain. Then I reinsert the anode rod, using a new one if needed.

Jetjam, if the water heater is a Suburban, then the drain plug has an anode rod incorporated. As time goes by, you will see the rod deteriorating; this is normal and when about exhausted, just replace it with another. It is sacrificial and is used to prevent electrolisis from eating at the tank itself.