Product Information: The gas valve is a gas distribution mechanism. When there is a need for more gas in the burner, a communication is sent from the PCB to the gas valve, which opens and allows gas to flow through the valve in to the burner or the pilot assembly dependant on the type of appliance installed.
This part is listed against 2 boilers on our website, The Potterton PUMA 100 , PUMA 80 .