English: A watercooled PC. The hose is secured to hose barb fittings with screw/band hose clamps. In the lower left is a D5 pump made by Laing GmbH, part of ITT Corporation. From there, coolant flows vertically to the water block on the CPU, then right to the radiator (not visible), then back to the pump. The hose rising vertically to the top of the picture is a T Line used to fill and empty the coolant loop.