GIGA centrifugal pumps from Wilo USA include 3- and 4-inch models, bringing the total offering to 28 models. They are class IE5 space-saving in-line circulators with ECM technology and have a motor-powerhead combination that gives optimal control over the pump, up to 9 hp. 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, they have high corrosion protection due to their cataphoretic coating, high-efficiency EC motors, optimized hydraulic design and the ability to self-adjust to system demands. 888-945-6872; www.wilo-usa.com.