Hot Water Heater Gas Valve On Position

This is not the valve located on the control box mounted on the water heater but is instead a valve installed along the pipe run itself.

Hot water heater gas valve on position.

The pilot light is still on and gas from the main supply line is still on. If you see the result is under 400 millivolts then it shows you with a poor thermopile. The valve can have different appearances depending on who did the installation and when it was installed. If it reads more than 400 millivolts then it shows you with a good thermophile output for your device.

Tighten the nipple using two pipe wrenches photo 7. On a gas water heater the gas control valve contains the thermostat and pilot light controls. The gas dryer that was connected to this valve was recently sold and before that the yellow valve was in north and south position. The off position on the gas valve dial only means that it will not heat the water.

Apply gas rated pipe thread sealant or tape don t use standard white teflon tape to the gas nipple and thread it into the new gas control valve. Go back to the hot water tap opened earlier. It is necessary to hold your gas control knob in the pilot position repeat this test. Need to hire a plumber.

Once cold water begins to flow from the tap turn it off. Some valves both gas and water manufactured before 1980 contain a lubricant to help the valve seal better and operate more smoothly. Unlike components of an electric water heater the gas control valve is entirely outside the water heater and mounted near the bottom of the unit. Turning the water heater gas valve to off is not the place to do this.

The valve is called a t p valve or tpr valve for temperature and pressure relief. Be sure to check the valve opening once it s closed to ensure there are no water leaks. For those with propane or liquefied petroleum gas there s a main shutoff valve on the tank itself and usually a main shutoff valve somewhere before the first appliance. If all goes well a tpr valve never gets used except during testing.

Locate the gas pipe that feeds gas into the water heater and locate the shut off valve. You need to turn the inline valve ninety degrees so that it is perpendicular with the gas line. On the side or top of your water heater tank is a valve connected to a metal or plastic discharge tube pointing downward.