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Circulator Pumps

Circulator Pumps

Shop circulator pumps for hydronic heating and hot water recirculation systems. Furnace Part Source carries cast iron, stainless steel, and cartridge-style circulator pumps from Taco, Grundfos, and Xylem-Bell & Gossett by horsepower, voltage, and connection size.

Use the product list below to find the correct circulator pump by part number, horsepower, or connection size. Always confirm the flange size, voltage, and horsepower before ordering to help avoid fitment issues.

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Circulator Pumps

Circulator pumps move heated water through hydronic heating loops, radiators, and hot water recirculation systems. Properly sizing a circulator pump to the connected equipment helps reduce energy use while ensuring adequate heat transfer throughout the system.

Furnace Part Source carries a range of circulator pumps for residential and light-commercial hydronic heating applications, including cast iron, stainless steel, and cartridge-style designs.

Common Circulator Pump Types We Carry

Common circulator pump types include:

  • Cast iron circulator pumps for standard hydronic heating loops.
  • Stainless steel circulator pumps for applications requiring added corrosion resistance.
  • Cartridge-style circulators that allow the motor cartridge to be serviced without removing the pump body from the piping.

How to Find the Right Circulator Pump

Before ordering, check the existing pump's nameplate for the model number, horsepower, voltage, and flange or connection size. Manufacturers frequently update circulator pump model numbers, so the current replacement may not always share the exact original part number.

For best fit, compare:

  • Original circulator pump part number
  • Horsepower and voltage
  • Flange or connection size
  • Housing material, such as cast iron or stainless steel

Circulator Pumps From Leading HVAC Brands

Our catalog includes circulator pumps from Taco, Grundfos, and Xylem-Bell & Gossett, covering a range of horsepower ratings, connection sizes, and housing materials used across residential and light-commercial hydronic systems.

Need Help Matching a Circulator Pump?

Not sure which circulator pump you need? Use the model number and specifications from your existing pump to narrow the search, or contact Furnace Part Source for help identifying the correct replacement.

Circulator Pump FAQs

What does a circulator pump do?

A circulator pump moves heated water through a hydronic heating loop, radiators, or hot water recirculation lines, distributing heat throughout the connected system.

How do I know if my circulator pump has failed?

Common signs include uneven heat throughout the hydronic system, unusual noise, leaking at the pump body, or the pump failing to run at all.

Can I use a stainless steel pump in place of a cast iron pump?

In some cases, yes, if the horsepower, voltage, and connection size match, though always confirm compatibility with your system's fluid and application before switching materials.

Why do circulator pump model numbers change over time?

Manufacturers periodically update circulator pump designs and part numbers. When the original part number is discontinued, check for the current replacement model that meets or exceeds the original specifications.