Norcold Gas Valve/ Spark Sense Electrode/ Burner and Orifice 639572/ 50859 (fits the N7/ N8/ N10 models) This is the gas solenoid valve, burner/ orifice and spark electrode assembly for the following Norcold models: N7 NA7 N7X N7XF N8 NA8 N8X N8XF N10 NA10 N10X N10XF