• Replacement sensing head for the RT212 thermostatic radiator valve series designed to fit standard M30 � 1.5 valve bodies
• Liquid-filled sensor for fast response to temperature change and improved performance over spring-type heads
• Temperature setting range covers approximately 8C (frost protection) through to 28C with range limiting feature for controlled comfort
• Positive OFF position enables full shut-off of radiator flow when required for zoned or room-by-room control
• Compatible with reverse flow valve body installations for vertical or horizontal flow or return mounting giving installation flexibility

The Drayton RT212 sensing head (Part No 08 09 099) is a direct-fit replacement thermostat head compatible with RT212 valve bodies and other M30 � 1.5 fittings. It uses a liquid-filled sensor which reacts quickly to ambient temperature changes, offering improved accuracy and response compared with older wax-element types. The head is factory-set to provide a frost-protection position (approximately 8C) and a full-range setting up to approximately 28C. A range-limiting feature allows installers or homeowners to restrict the maximum setting if needed, supporting energy management. The head includes a positive OFF position, enabling the radiator valve to close fully when the room is not in use or for zoned shutdowns. It is compatible with valve bodies designed for reverse flow (flow or return) and installations where vertical or horizontal pipe runs are present. This makes it suitable for retrofit applications where the existing valve body is retained and only the head is replaced. The white finish ensures a clean appearance in modern interiors. Choose the RT212 sensing head when you need a cost-effective upgrade to radiator temperature control without replacing the entire valve body.