The Caleffi 449010 is a manual control knob for Caleffi 220 and 221 series thermostatic radiator valve bodies. It replaces the standard cap so the valve can be shut off or throttled by hand, without fitting a thermostatic control head.
Best for 220 and 221 series valve bodies that are used for isolation or balancing rather than automatic room temperature control.
Specifications from Caleffi datasheet 01034/23 NA, 4490 series accessories. Reviewed August 2026.
Key Features
Manual Control Without a Head
Turns a 220 or 221 series body into a hand-operated valve. Useful where automatic control is not wanted, or as an interim fitting before control heads are commissioned.
Isolation and Balancing
Caleffi specifies the 449010 as the means of shutting off the valve for isolation or throttling it to preset flow for balancing on the 220 and 221 series.
Interchangeable with a Control Head
Caleffi lists the 449010 as the manual alternative to a thermostatic control head on the 220 and 221 series, so a knob can be swapped for a head later without touching the pipework.
Matching White ABS
White RAL 9010 ABS, matching the standard control knob and cap finish across the Caleffi radiator valve range.
Technical Specifications
| Product Type | Manual Knob |
| Series | 4490 Series |
| Material | ABS, white RAL 9010 |
| Compatible valves | Caleffi 220 and 221 series valve bodies |
Documentation
Related Products
- Caleffi 200000 : Control Head, Built-in Sensor
- Caleffi 220400A : Angled TRV Body 1/2" NPT
- Caleffi 221400A : Straight TRV Body 1/2" NPT
- Caleffi 472000 : Control Head, Remote Knob
Frequently Asked Questions
What is the Caleffi 449010?
A manual control knob for Caleffi 220 and 221 series radiator valve bodies. It replaces the standard cap so the valve can be opened, closed or throttled by hand.
Which valves does the Caleffi 449010 fit?
The Caleffi 220 and 221 series valve bodies, including the 220400A, 220500A, 221400A and 221500A.
Can a thermostatic head be fitted later?
Yes. Caleffi specifies the 449010 as the manual alternative on the 220 and 221 series, so a 200, 201, 203 or 472 series control head can replace the knob at any time without pipework changes.
- Product Type:
- Manual Knob
- Product Family:
- Fittings and Accessories
- Series:
- 4490 Series
- Fits Series:
- 220/221 Series
- Material:
- ABS, White
