The extended range of models for the Wilo-Stratos GIGA line of centrifugal pumps from Wilo USA includes 3- and 4-inch models. The GIGA circulator with ECM technology is designed for use in hot-water heating systems, air conditioning, closed cooling circuits, industrial circulation, and solar and geothermal systems. The GIGA features a motor-powerhead combination, which gives optimal control over the pump, up to 9 hp with motor efficiencies now in class IE5. The control range is up to three times as high as conventional electronically-controlled pumps, and there are multiple control modules available for integration with building management systems. With heads up to 167 feet and flows to 550 gpm, the GIGA also features high corrosion protection due to its cataphoretic coating to withstand high pressure and weathering. 888-945-6872; www.wilo-usa.com