The high velocity series Taco® 009 cartridge circulator is designed for quiet, efficient operation in higher-head/lower-flow applications for Hydronic heating, Radiant in-floor/panel heating, solar heating, heat recovery and domestic water recirculation systems. Its unique field-serviceable cartridge contains all moving parts. Replacing the cartridge rebuilds the circulator. With no mechanical seal, the self-lubricating, maintenance free design provides unmatched reliability. Available in cast iron or bronze construction.