Two port motorised Power Extra valve to control the central heating or hot water circuit in domestic fully pumped central heating systems. Suitable for 22mm pipe. For convenience the neon indicator light illuminates indicating when the valve is open. Manual override lever for use when filling, venting or draining the system. Fitted with a 1.1m length 4-core cable, and is supplied with two screws for securing to the valve body. Compatible replacement to all leading makes., Manufacturer: Myson