Potterton's Derwent boiler. The gas valve is employed in the distribution of gas. When gas is required in the burner, the printed circuit board (PCB) sends a signal to the gas valve, which opens to allow gas to flow into the burner or the pilot assembly (depending on the model of the appliance).

Brand Name	Potterton
Colour	None
Material	None
Manufacturer Model No	COMC17007654
Wear Type	None
Type	Gas Valve Honeywell
Certifications Met	None
Country of Origin	None
Protects From	None
Waterproof	None
Number of Pockets	None
Waist Size	ab78cj19fw
Toilet Cistern Capacity	FTW
Range Description	Honeywell