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This drain system, originally created to increase safety in neutral buoyancy tanks, has a high potential for increasing safety and performance in any application using a recirculation system. As opposed to a traditional cover for a drainage system, this device is comprised of many long, narrow channels through which water can flow. The openings are configured in a way that there is never a suction force large enough to trap one or multiple human bodies. In addition, the channels are deep enough that hair or other objects cannot become entangled or knotted because they cannot reconnect once in the channel. The drain system can be patterned to suit any pool (or spa, tank, container, etc.), and it can be placed on the floor, walls, or both. The technology is suitable for mass production methods such as extruding or molding. Why It's Better: The NASA innovation combines many desirable safety features into one simple system. Along with the decreased risk of limb entrapment and entanglement, the drain system also does a more thorough job of mixing chemicals, which diminishes bacteria growth and decreases operating costs. The system requires no protrusive drain cover, thereby eliminating the risk of injury due to bodily contact with the drain.