The Tower Flue Components two port spring return zone valve comes with a 28 mm compression fitting and an auxiliary switch. This is for general purpose flow control applications or central heating systems. When correctly wired with an appropriate room thermostat, cylinder thermostat, and programmer, the valve will control the water flow from the boiler to hot water and from the boiler to central heating.

• 28 mm two port motorised zone valve
• Operating temperature range is 5C to 88C
• Supply voltage is 220 V to 240 V AC 50 Hz
• Power consumption is 6 W
• 1 m cable length
• Two port spring return valve with 28 mm fittings and auxiliary switch
• Manual override lever