Astria Gas Fireplace Millivolt Thermocouple (22"): 74L57-AMP

Astria Millivolt Thermocouple (22"): 74L57. The thermocouple is a safety device that will cut the flow of gas if the flame is not present. If your pilot light will not hold or your pilot intermittently goes out, your thermocouple may need to be replaced.   

Note: NOT for use with vent-free models