UPS 26-99FC 3-Speed 1/6 Horsepower Circulator Pump with Flow CheckGrundfos UPS 26 99FC 3 Speed Cast Iron Circulator Pump with Check Valve 1 6 HP 115V The Grundfos UPS26 99FC is a 3 speed cast iron circulator pump (Grundfos SKU# 52722512) with built in flow check. 3 speeds (Low Med High) of the Grundfos UPS26 99FC make this model very versatile and allow to use it in a large variety of heating applications including radiant, hydronic, radiators, fan coils, etc. A built in flow check eliminates the need to buy and