A thermocouple is a device that is made of two different metals that produce a small charge when heated on one side. This small charge turns on an electromagnet which opens a valve and allows the water or gas to flow through .
Fits a Number of Appliances
Technical specification
Manufacturer Model NoS202429Brand NameGlow-worm
Reviews
Glow-worm S202429 Thermocoupleinterrupter Insert Sit 0.994.012