The Drayton MA1 For 3 Port Mid Position Valve Body Motorised Actuator Head 5 Wire is a compact storage tank water heater designed for indoor use. This boiler heating system operates on corded electric power and has a brass tank lining material. With a voltage of 220/240V, this United Kingdom-made water heater from Drayton features energy efficiency rating A and a power of less than 100W. The 5-wire design and side water connection location make it easy to install and use in any home heating and radiator system.