Taco circulator pumps are designed for moving water within hydronic heating and cooling systems via centrifugal forces. These self-lubricating units come with a compact, rugged & space-saving design for added safety and an impeller (made of polypropylene, Noryl (R) or stainless steel) for providing continuous rotation and imparting a centrifugal force on the water to move out of the pump through the pipes. Some models feature an integral flow check (IFC) valve, preventing gravity (reverse) flow and reducing installation & maintenance time & cost. Available in cast iron, bronze & stainless steel variants, these cartridge circulators allow a maximum flow of 125 gpm @ 16 ft and work efficiently at a maximum operating pressure of 175 psi. Choose from a wide range of these circulating pumps, available in flanged, sweat and NPT connections on Raptor Supplies.