SPECIAL OFFERS Zone Valve 22mm 2 Port TTH222MZV

The TotalHome 22mm 2 port zone valve is a motorised valve used to open and close flow through a single pipe circuit on a domestic heating system. It is powered open by the motor and closes again under spring return action once the demand ends. The valve sits on the heating or hot water circuit and is driven by the system controls, so it belongs to the TotalHome range of heating controls and ancillary components.

• The valve no longer opens when the programmer or room thermostat calls for heat, leaving the circuit cold
• The valve body stays open after demand ends, causing overheating or unwanted circulation
• The motor head runs hot, buzzes or hums without moving the valve
• Water weeps from the spindle or body joints
• The lever moves freely with no resistance, indicating a broken return spring

• Confirm the valve size and port configuration against the existing unit before ordering
• Check the appliance or system documentation to verify the correct valve for the circuit being controlled
• Inspect the mating pipework and olives, and renew the seals if the valve is being swapped on an existing installation
• Isolate and drain the affected circuit before removal