①. Flame failure valve with inlet and outlet with Flare thread 5/8-18UNF ②. Only suitable for Low pressure application (max BTU rating: 50000) ③. Suitable for Gas grill, heater, fire pit, fireplace if same connections ④. Specifications: 600mm thermocouple with M8*1 threaded head; Bakelite knob OD 38mm, D shaft 6.1mm ⑤. Operation Instructions: 1. Fix the valve on a plate or board of your grill or fire pit by the head screw and flange. 2. Connect your inlet and outlet hose on inlet and outlet side. (fix it tightly enough in case of gas leakage) 3. Fix the thermocouple nut M8 on the valve end tightly (Check if your valve end thread if 8mm before you buy) 4. Connect thermocouple and end thread well 5. Open gas by correct size knob 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: If your thermocouple is always be heated on flame; If the thermocouple end is well connected with valve; If the inlet and outlet side well connect with hose you have ⑥. Colour: yellow ⑦. Material: copper ⑧. Package Contents: 1 x Gas Control Valve ⑨. Only the above package content, other products are not included. ⑩. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.