• Direct Industry Compatibility: A high-performance, cost-effective replacement for industry-standard 22mm zone valves including the Honeywell V4043H series
• No-Drain Maintenance: Detachable actuator powerhead allows quick motor replacement without draining your entire central heating system
• Standard 22mm Compression: Precision 22mm fittings for connection to UK copper or plastic pipework in domestic S-Plan and Y-Plan setups
• Integrated Control Switch: Built-in auxiliary microswitch (rated 2.2A) and 1-metre 5-core heat-resistant cable for boiler and pump signal management
• Reliable Fail-Safe Action: Spring-return mechanism ensures the valve fails to a closed position during power loss, preventing unintended heat flow
• Pro-Installation Standards: Suitable for horizontal or vertical mounting, provided the actuator head is never positioned below the level of the pipework

The TotalHome TTH222MZV 2 Port 22mm Motorised Valve is a professional grade solution for controlling water flow in domestic central heating and hot water systems. This complete valve and actuator unit is engineered to provide a reliable, long-term alternative to expensive brand-name replacements. It features a high-torque motor and chemical-resistant internal seals for smooth operation even in older systems where debris may be present.

Compatibility and replacement details. This unit is a direct functional replacement for the industry-standard Honeywell V4043H series, and a high-quality alternative for Danfoss HPA2 setups when replacing the complete valve. It is designed for S-Plan and Y-Plan central heating systems to provide precise zone control. Standard 22mm compression fittings make it compatible with UK copper and plastic pipework.

Technical specifications. Designed for UK mains systems, the valve operates on a 230V AC (50Hz) supply, drawing only 6W when energised. Each unit is supplied with a 1-metre 5-core heat-resistant cable for integration into existing wiring centres. The built-in auxiliary microswitch, rated at 2.2 amps, provides the signal to fire the boiler and pump once the valve has reached the fully open position.

Installation. Please verify your system requirements before purchase: this is a 2-port valve for 22mm pipe, and is not a 3-port mid-position diverter. During installation the valve can be mounted horizontally or vertically, but the actuator head must never sit below the level of the pipework, to prevent electrical damage from any leak. We strongly recommend flushing the heating system and using a chemical inhibitor before fitting, to stop internal debris jamming the valve seat.