Taco 0011-BF4-J High Velocity Series 0011 Cartridge Circulating Pump Cast Iron with Bronze Cartridge High velocity performance and Direct Drive Low Power Consumption Quiet, efficient operation, unique Replaceable Cartridge Design Field Serviceable Unmatched reliability Exclusive Anti Condensate Baffle with Ambient Air Flow Protects motor windings against condensate buildup Rubber gaskets included with pump