Thermocouple Replacement For Direct Vent Fireplaces 27 Inch Sensor Fits Heatilator Heatnglo And Robertshaw 446-511 Replaces 34820 72956 For SIT 820 Nova Gas Valves

Direct Vent Thermocouple Replacement Sensor for 27-In Unit
✔️ Replaces Robertshaw 446-511; fits SIT 820 Nova valves, single unit

This direct vent fireplace thermocouple is the flame-sensing device that ignites and monitors the burner flame. It's compatible with Heatilator, Heat-N-Glo, and Robertshaw direct vent systems, and you’ll typically find it in gas fireplaces that use fine-thread valves.

✅ Replaces Robertshaw 446-511; cross reference 34820 and 72956
✅ Fits direct vent valves with fine thread on Robertshaw and SIT 820 Nova lines
✅ 27 in (690 mm) sensor length matches common direct vent setups
✅ Copper sensor material for dependable flame sensing

💡 What is a direct vent fireplace thermocouple replacement used for?

It's a handy safety sensor that confirms flame presence before allowing gas flow.

- It detects flame and signals the gas valve to stay open while the flame lasts - Works with Heatilator, Heat-N-Glo, Robertshaw, and SIT 820 Nova direct vent systems - Common replacement part with cross reference numbers 34820, 446-511, 72956 - Helps prevent gas leaks if the flame goes out and supports safe ignition