Wilo Star S 21 RFC circulator pump incorporates a cast iron housing, three speed motor (Low/Med/High) and a built-in, removable check valve. Wilo Star S 21 RFC is among the most popular and most versatile circulator pump models on the market. Pump’s performance parameters cover nearly all traditional heating applications – from radiant and baseboards, to fan coils and zoning and many others. 3 speeds allow to set up the circulator pump in a way, that matches the system’s requirements, while wet rotor design allows it to be virtually silent while operating.
- Rotating flanges
- Built-in motor protection for longer life and better performance.
- Suitable for a wide range of applications, including radiant heating, hydronic heating, fan coil heating,
- solar and other system types.
- Whisper-quiet operation for sound sensitive installations.
- Includes (2) Gaskets (O-rings) and a removable check valve
- UL/CSA listed.
- Closed loop radiant heating & snow melting systems.
- Baseboard/Radiator/Fan coil heating and other hydronic heating applications.