Turn off the power to the water heater or set the gas control valve to the “Vacation” setting. Turn Off Gas to Hot Water Heater. Shut off the gas or electricity to the water heater and open a hot water faucet and let it run full blast for about 10 minutes to reduce the water …

Remove the temperature pressure release valve and screw in the vacuum adapter. Close the cold water supply valve to the water heater. Turn on the hot water. Apply suction. Turn the Knob on Your Hot Water Heater’s Thermostat to “Off”. This usually involves manually turning the valve 90 degrees. 3. 1. The thermostat on a gas hot water heater is usually found near the bottom ... 2. Open the drain valve and turn on the closest hot water faucet to allow air into the tank. Close the cold water inlet valve which is usually located at the top of the tank.
Turn on the hot water from a nearby faucet inside the house to prevent a vacuum from forming in the lines and flow air into the water heater, allowing it to drain easier. Report this ad. How to Flush Your Hot Water Heater. Attach the shop vacuum hose and fire up the vacuum.