The MCP655 Series pumps are high reliability, high pressure industrial pumps, featuring a 50,000 hour MTBF (5 year lifetime). Such reliability is afforded by the unique design of the motor, which contains only one moving part: the magnetically driven spherical impeller spins on a single ceramic bearing, thus extending the life of this pump beyond existing standards. The pumps are completely plug-and-play, and connect directly to the computer power-supply with a standard 4 pin power connectors. The MCP655 series compact design, quiet, reliable and powerful motor make them ideally suited for heavy duty liquid cooling applications where quiet operations are essential. The PWM pump speed can be varied using the Motherboard PWM control. The MCP65X series housings are precision machined from black Acetal or Clear Acrylic. These pump tops featue standard G1/4 thread class for inlet and outlet ports allow to choose which fittings and tubing size to use. The outlet port is perfectly aligned to the volute exit path improving hydraulic performance. The mounting brackets can be oriented for horizontal or vertical pump installation. Four G1/4 ports allow three possible flow path configurations.