Koolance RP-985 Reservoir and Pump (Rev2.1) The RP-985 incorporates Koolance's PMP-300 pump. Designed to fit a single 5.25" (CD) bay, it utilizes the same reservoir, front LED display, and rear G 1/4 BSPP (parallel) thread fitting sockets. Features: Fits a single 5.25" CD bay. Adjusts radiator fan speeds automatically, or with 10 manual levels. Manual pump speed adjustment.