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 Majestic, Monessen, Empire, and many other fireplace companies. This valve uses a course thread thermocouple.
Most people replace the fireplace valve for one of two reasons: first - the pilot light will not stay on when you release the pilot knob, and second - the valve will not turn the main burner on when the switch is engaged. Before you replace your valve, make sure you do the following things.Clean and blow out the pilot flame assembly so that it has a really strong flame heating the thermocouple and thermopile. Change your thermocouple if the pilot will not stay lit, even after holding it for several minutes. Change the thermopile if the valve will not open and ignite the main burner. Rule out bad wiring or control device (switch, remote control, thermostat) by bypassing the device.
To bypass, touch a small jumper wire to the TH and THTP terminals on the valve. This will open the valve and allow the main burner to ignite.Only replace the valve when everything else has been tried. Discount Home and Garden Products accepts payments via Pay Pal. We accept credit cards processed through Pay Pal. Feedback Policy Your satisfaction is important to us. These charges are the buyers responsibility. The item "Monessen Empire Vent Free Fireplace Natural Gas Valve SIT 820 NOVA 0820637" is in sale since Wednesday, January 30, 2019. This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Fireplaces & Stoves\Other Fireplaces & Stoves". The seller is "warmerplace" and is located in Saint Clair Shores, Michigan. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay, Russian federation.