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MOTORISED ZONE VALVE ACTUATOR: A 2-port actuator head designed to provide reliable zone control in central heating systems. COMPATIBLE REPLACEMENT: Directly replaces Honeywell V4043H 2-port zone valves, ensuring a straightforward swap with minimal disruption. COMPATIBILITY: Suitable for use with both 22mm and 28mm zone valves, making it versatile for a range of heating system configurations. DURABLE CONSTRUCTION: Features a sturdy metal housing for long-lasting performance in demanding central heating environments. EASY INSTALLATION: Comes with a pre-attached cable for convenient wiring, allowing for a hassle-free fitting process.