Product Review

Only works with ventless product, not with direct vent sealed glass units. 14D0468 Monessen Hearth Replacement SIT 820 NOVA Vent Free Fireplace Natural Gas Valve Model 0820636. 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.