This scrubber system separator, part of the 4900 series, removes air and dirt in hydronic systems. The product clears system components, including pipes, pumps and associated equipment of sand, dirt and rust. Series 4900-AD models also can be used with chilled-water systems. Scrubbers should be installed immediately before the centrifugal pumps so large air bubbles and system impurities are removed before they can damage the pumps.

Taco Inc., 1160 Cranston St., Cranston, RI 02920; (401) 942-8000; fax (401) 942-2360; www.taco-hvac.com.