Extending its Pro-Fit line of replacement parts, Taco has introduced its new Replacement Kit Pro-Fit® Pump Less Volute Series. Each Pump Less Volute Series model is a universal replacement for many circulator models, minus the volute. The Replacement Kit (RPK) Pump Less Volute Series is an economical alternative for replacements of Bell & Gossett or Armstrong circulators. Each Pro-Fit Series model includes a heavy-duty maintenance-free, permanently-lubricated motor, a universal bearing assembly for iron or bronze pumps, a universal one-kit-fits-all replaceable bearing cartridge design, and a durable Noryl® impeller ideal for open or closed systems. Taco.