The Drayton ZA5 2 Port Zone Valve is a new, white, corded electric motorised actuator head designed specifically for indoor storage tank water heaters. This valve, suitable for use with boilers, boasts an energy efficiency rating of A and is made with brass tank lining material. Ideal for those looking to regulate the flow of water in their heating system, this product from Drayton offers reliable and efficient performance. This Zone valve can also be used with just 5 wires 6th wire not always required.