: Most gas fireplaces and water heaters use a 750 millivolt (mV) generator. Some older or specific systems might use a 250mV version. Connection Type :

To buy the correct thermopile, you must first confirm whether your system requires a or a thermocouple , as they are not interchangeable. A thermopile is essentially an array of multiple thermocouples connected in series to generate a higher voltage (usually 750mV ), which is necessary to power gas valves and accessories like wall switches or remotes. 1. Identify Your System Requirements

Before purchasing, check these specifications to ensure compatibility:

: Often used in specific pilot burner assemblies.

You can find replacements through various retailers like Amazon or specialized parts stores like Stove & Grill Parts For Less .

: Most common for fireplaces, featuring two wires with spade or fork connectors.

: Measure your existing thermopile's wire length. Common lengths include 24" , 36" , and 48" . It is safer to buy a longer lead and carefully coil the excess than to buy one that is too short. 2. Selecting a Product