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The Pump Products help line staff recently received an inquiry about replacing the cartridge on a Taco circulator pump. In the interest of spreading information on our products as widely as possible, here’s what our Product Experts had to say.  Q. I have a Taco 003-B4 circulator pump that is 12 years old and has now stopped working. I would like to know if the 003-001RP cartridge will fix the problem or if I need an entire new complete assembly. How can I make the determination if this is the right replacement part and if this cartridge is the right replacement or not Seems like I might need to evaluate motor, bearing and capacitors to properly diagnose.  Tommy, TX (more…)