Final answer:
An Air Gap is the type of backflow protection device indicated by ASSE 1001-2008, offering a simple and reliable means to prevent contaminated backflow into drinking water systems.
Step-by-step explanation:
The type of backflow protection device indicated by ASSE 1001-2008 is an Air Gap. This form of cross-connection control uses a physical separation between the end of a water supply outlet and the flood level rim of the receiving vessel.
It's the simplest and most reliable means of preventing backflow, as there's no mechanical device that could fail. An air gap is generally considered to provide the most secure form of protection against back siphonage and backpressure of contaminated water into potable water systems.