Taco 007-F5-8IFC Circulator Pump with an IFC (Integral Flow Check) is designed to simplify piping, reduce installation costs and improve system performance. With an IFC (Integral Flow Check) inside the Taco 007-F5-8IFC model pump there is no need to install separate in-line flow check. The IFC reduces a pressure drop and increases flow performance versus in-line flow checks. Both the IFC and the cartridge are easily accessed for removal and service.