The circulator is a pump that forces the hot water to radiators throughout a house. Problems with the circulator usually occur when the coupler that separates the motor from the pump breaks. This will generally make a lot of noise. Another source of trouble with the circulator is the pump seal. If water leaks from the pump, chances are the seal is damaged. If the circulator develops either of these problems, call a professional service person. 

Pumps specially designed for the circulation of hot water in heating, air-conditioning or cooling systems. 
Bronze and stainless steel models also are used to circulate sanitary hot water around the home to ensure that it is readily available quickly at all outlets, thus saving both water and energy.  

Features & Benefits

• Wet rotor, bearings lubricated by pumped liquid gives you quiet operation
• Rotor chamber protected by sintered bronze filter
• High capacity built-in capacitor for high starting torque
• Rotating parts in contact with water made of corrosion-proof materials for a dependable, maintenance free life
• Pump casing with threaded ports for direct mounting on pipe, adapting to any type of installation
• Three-speed motor with manual selector switch, providing low electrical consumption
• Common dimensions with most other brands to make retrofitting easier