Taco 007 BF5-J Pump (Cast Iron pump with a Bronze Cartridge) - Is an upgraded and superior pump then the standard Taco 007-F5 and equivalent base model pumps. The Bronze Cartridge increases the life of the pump and is able to handle the hard application better. This pump will seamless replace other pumps without any issues, it simply is the exact same pump as the Taco 007-F5 with better parts inside. How much time do you waste replacing pumps? The cartridge is replaceable if you do have a failure. The Taco 007 residential circulator is designed for use in hot water heating systems and is used in circulating zones in floor heat and baseboard. The unique replacement cartridges deliver direct drive and are serviced without replacing pump. They are self lubricating and require no maintenance. (110 volt) *** GASKETS COME WITH PUMP ***