Taco 009 BF5-J Pump (Cast Iron pump with a Bronze Cartridge) - Is an upgraded and superior pump then the standard Taco 009 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 seamlessly replace other pumps without any issues, it simply is the exact same pump as the Taco 009 with better parts inside. How much time do you waste replacing pumps? The cartridge is replaceable if you do have a failure. Taco 009 BF5-J Pump (Cast Iron pump with a Bronze Cartridge) - is specifically designed for high-head/high-flow applications in large residential and light commercial systems. It is ideal for high pressure drop boilers, fan coil units, heat exchangers, larger radiant systems, heat recovery and geothermal systems. The bronze cartridge 009 should be used on open loop systems. Taco 009 BF5-J & Taco 0011 BF4-J are the flagship pumps of the wood boiler industry. DO NOT compare this pump to the Taco 009-F5 pump. The F5 is the base model Taco 009. Ours is the PREMIUM Taco 009. *** GASKETS INCLUDED WITH PUMP *** Typical Applications: Hydronic Heating Radiant In-Floor/PanelHeating Closed-Loop Solar Heating Systems. ....read more