A direct-interface liquid-cooled (DL) Rack Information Handling System (RIHS) includes liquid cooled (LC) nodes that include a system of conduits supplying cooling liquid through the node enclosure and including a supply conduit extending from a node inlet coupling and a return conduit terminating in a node outlet coupling. The node inlet port and the node outlet port are positioned in an outward facing direction at a rear of the node enclosure and aligned to releasably seal to the respective inlet liquid port and outlet liquid port in the node-receiving slot for fluid transfer through the system of conduits. An air-spring reducer conduit is in fluid communication with the system of conduits and shaped to trap an amount of compressible fluid that compresses during sealing engagement between the node inlet coupling and node outlet coupling and the inlet liquid port and outlet liquid port, respectively.