Taco 110-120 Series In-Line Circulators are designed to efficiently circulate heated or chilled water in residential or light commercial Hydronic Systems. These 110-120 Series In-Line Circulators may also be used for zoning large installations and are available in bronze or stainless steel construction for domestic hot water applications. 110-120 Series In-Line Circulators demonstrate proven performance, dependability, quiet operation and long lasting performance.