Water heater gas valves control gas supply to the pilot and allow the pilot to be lit. The lit pilot heats the water heater thermocouple and heats the water. Products are designed for use in standing pilot applications and are simple to replace. Reduce scalding risk, labor cost, and repair time with Resettable Emergency Temperature Cutoff. Decrease customer callbacks with a larger pilot flame. Shop a range of water heater gas valves right here at Jackson Systems & Supply.