Systems and methods for cooling a datacenter are disclosed. In at least one embodiment, a server tray or box includes a surface with a flow-through fixture or manifold that extends on both sides of the surface, that includes an inward coupling, an outward coupling, a flow controller, and a state sensor, the state sensor to monitor a flow-through fixture or manifold, where a flow controller of a flow-through fixture or manifold can change a flow of a coolant through a flow-through fixture or manifold and can selectively trap a portion of a coolant within a flow-through fixture or manifold.