Paula -
If you have the binder, that is a good thing. It will contain the Installation instructions and the Operating instructions for your water heater.
As Tentcamper says, the water heater should drain through one of the front low point drains under the camper. It will drain a lot faster if you turn on the hot water faucet in the kitchen sink, to vent air into the tank.
Your blue binder will also contain the User instructions for the entire trailer. In the plumbing section, it will probably tell you that the entire plumbing system, including the water heater, will drain by gravity through the four low-point drains. With all the water out of the plumbing, there is nothing left in the system to freeze, so no anti-freeze is needed. And if no antifreeze is used, the water heater does not require a bypass.
There are a couple easy-to-manage exceptions to the "gravity draining" statement. You need to remove the shower head in the bathroom and the outdoor shower head. If you have a sprayer on the kitchen sink, take it off, too. Shake the water out of them, and set them aside. Run the water pump for about 5 seconds to ensure that the pumping chamber is empty.
You can also do a Search on this board for the word "bypass", or "winterize".
Bill
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