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A steam relief valve is a tool used for releasing pressure from home applicances, such as a water heater to avoid dangerous explosions or other dangerous things to happen. Here are some tips on installing a steam relief valve. 
More Instructions
1), Turn off your hot water heater before installing a steam valve. If you have an electric hot water heater, then simply involves unplugging it from the wall.
2), Turn off the main water source leading to the hot water heater.
3), Allow the hot water heater to sit for an hour, so that the steam inside of it cools completely.
4), Remove the steam relief valve that is installed on your water heater with the wrench. Turn the wrench counterclockwise to detach the steam relief valve.
5), Place a layer of sealant tape on the pipe threads of your new steam relief valve.
6), Screw the new valve onto the water heater with your hands.
7), Tighten the steam relief valve into place by turning it clockwise with the wrench.
8), Turn the new steam relief valve to the closed or off position. You can now reattach the water heater to its power or gas supply and turn on the water line leading into it.


 
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Steam valves are the common tools for our house and they are designed to release pressure. A steam valve is a special valve used for regulating the flow of the steam. Steam valves usually come in piprs or holes with flaps covering the opening. When there are too much stam accumulating in a machine, the flap will open and release some pressure. Steam valves are designed to release pressure in order to make sure the machine can function well. Since there are a variety of types of steam valve in the market, here will introduce you one type of steam valve which is commonly seen in our daily life.
Tea Kettles
You probably have a steam valve in your kitchen, in the form of a tea kettle. The opening from which you pour your tea functions as a steam valve. When you heat your water, some of it evaporates and expands. This causes pressure to build inside the kettle. The pressure needs to be released via the valve.