The thernmocouple works for patio heaters with universal threaded head Operation Instructions 1). install the thermocouple tip on a board and use two nuts to fix it's location 2). Keep the tip at around 5mm distance from the burner hole in right height. 3). Faston the thermocouple nut M8 on the valve end tightly (Check if your valve end thread if 8mm before you buy) 4). Connect two flat terminals well with the current tilt switch terminals. 5). Open gas and push your valve around 5-10s till the thermocouple head is heated enough. 6). Release your hand and it work properly If when you release hand, gas valve shut off again, Please check a. If your thermocouple is always be heated on flame b. If the thermocouple end is well connect with valve c. If the terminals connect tilt switch well.