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All our items are 100% guaranteed! Monessen Ventfree Fireplace Natural Gas Millivolt Valve 14D0467 SIT 0820637. Product Dimensions: 8 x 7 x 7 inches. Item Weight: 2.2 pounds. Item Dimensions LxWxH: 8 x 7 x 7 inches.For Natural Gas, If you have a sealed glass fireplace this will not work. Valve number 0820637, verify it matches yours. Course Thread Thermocouple M8 Metric Thread. Compare your valve number, there are several models. Only works with ventless product, not with direct vent sealed glass units. 14D0467 Monessen Hearth Replacement SIT 820 NOVA Vent Free Fireplace Natural Gas Valve Model 0820637. This is a millivolt valve. Uses a thermopile (main valve), and thermocouple (pilot). Has 3/8 female pipe thread inlet and outlet connections.
You can vary hi - lo flame height. Millivolt valves can be controlled by a switch, remote control, or thermostat.This is used by Monessen, Majestic, Empire, and many other fireplace companies. There are many versions of these valves with different thermocouple threads. Make sure you match your model number.