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Circulation Pump System Repair

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Circulation Pumps are a specific type of pump used to circulate gases, liquids, or slurries in a closed circuit. Circulation Pumps are generally a pump with in-line suction and discharge flanges. They are commonly found circulating water in a hydronic heating or cooling system. Because they only circulate liquid within a closed circuit, they only need to overcome the friction of a piping system (as opposed to lifting a fluid from a point of lower potential energy to a point of higher potential energy). Circulation Pumps as used in hydronic systems are usually electrically powered centrifugal pumps.

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As used in homes, Circulation Pumps are often small, sealed, and rated at a fraction of a horsepower, but in commercial applications they range in size up to many horsepower and the electric motor is usually separated from the pump body by some form of mechanical coupling. The sealed units used in home applications often have the motor rotor, pump impeller, and support bearings combined and sealed within the water circuit. This avoids one of the principal challenges faced by the larger, two-part pumps; maintaining a water-tight seal at the point where the pump drive shaft enters the pump body.

Circulation Pumps are small - to medium-sized pumps and are usually supported entirely by the pipe flanges that join them to the rest of the hydronic plumbing. Large pumps are usually frame or pad-mounted. Circulation Pumps are used solely for closed hydronic systems can be made with cast iron components however some are made with bronze or stainless steel components depending on the application.


Circulation Pumps - In-line suction and discharge piping connections. Pump may be equipped with a traditional motor and coupling, or may have a wetted rotor motor that eliminates the seal.


Circulation Pumps are used in HVAC systems in buildings (chilled water circulation, hot water circulation, potable water circulation). Also circulation of cooling water in plants.

Recommended Media

Circulation Pumps pump water and relatively thin liquids.


Circulation Pump In-line design saves on floor space.

PumpMan Circulation Pump Repair Services:

  • Onsite troubleshooting
  • Removal of Circulation Pump from jobsite for breakdown and inspection (If required)
  • Complete disassembly and inspection including non-destructive testing and precise measuring.
  • Bead blasting and thorough cleaning of all Circulation Pump components and parts
  • Circulation Pump parts fabrication or rebuilt (As necessary)
  • Machine shop fully equipped providing professional rebuild capabilities
  • Motor analysis, rebuild, repairs and replacements
  • Reassembly
  • Delivery and installation as requested

PumpMan can repair, rebuild, redesign, or upgrade your Circulation Pump to get it back in service as quick as possible with the reliability that you expect. Planned Maintenance Programs create peace of mind and system longevity.