I have an Old Potterton Boiler, Pt No 907219, & yes you guessed it, it packed up last week, I know whats wrong but can't find one Anywhere, It's the Solenoid Valve that opens the Main boiler Gas, the pilot Solenoid is OK. I will Pay if you have one wheather it's the valve or the Solenoid. The part number of the Gas Valve is 25K49H-49, Thanks for any help I can Get.