Taco 0010-MSF2-IFC Circulator Pump, Speed Service, Cast, w/ Integral Flow Check, 1/2 HP. The 0010 3-Speed Service Pump is designed as an ideal replacement circulator for service contractors to use on any emergency no-heat call. The 0010 3-Speed replaces most commonly used circulators. Simply install it and set the speed to match the original pump performance. The handy new four bolt flange matches up to any pump regardless of style, type or age. 

Features:
3-Speed Switch
Fine tune to system requirements
Highest performance & starting torque in class
Heavy duty construction for longer life
4-bolt universal flange (0010 only)
Removable high-flow Integral Flow Check (IFC+)
Replaceable cartridge design
Quiet, efficient operation
Self lubricating, no mechanical seal
Wide range of applications
Cast Iron, flanged construction