Winterizing Valves
The low point drains are under the body on the left side, located at a sticker that says, "Low Point Drains." They are quarter-turn valves that are pretty tight to the chassis. It's hard to find them without a flashlight and putting your head under the chassis.
There is a shutoff for the inlet (blue) and outlet (red) of the water heater. The outlet is right at the water heater. The line containing the inlet is hard to trace, but there is only 1, as far as I can tell.
The water heater bypass is the valve with red tubing on one side and blue on the other. Shut the inlet and outlet, and open the bypass to avoid pumping antifreeze into the water heater. Use the water heater drain/relief valve to drain the water heater.
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