Water heaters are cylindrical tanks that heat water for residential and commercial use. They come in various sizes, with 50-gallon heaters being a common choice for households. In the video, Greg cuts a 50-gallon water heater in half to reveal its inner workings. While he admits he doesn't understand the exact function of most parts, the video offers a close-up look at the components that make up a water heater.
Inside a Water Heater
Tank: The tank is the main body of the water heater, typically made of glass-lined steel to prevent corrosion. The video shows the thickness of the tank, which can withstand high pressure and temperatures.
Insulation: Wrapped around the tank is a layer of insulation, which minimizes heat loss from the heated water inside.
Heating Element: Water heaters use different heating elements depending on the fuel source. Common residential heaters are electric or gas-powered. The video doesn’t show the heating element in detail, but in electric heaters, it’s a long coil of nichrome wire that resists electricity, converting it into heat. Gas heaters have a gas burner at the bottom of the tank.
Anode Rod: A long metal rod usually made of magnesium is positioned in the tank. The anode rod attracts corrosion, protecting the tank itself. Over time, the anode rod corrodes and needs to be replaced.
T&P Valve (Temperature and Pressure Relief Valve): A safety valve located on top of the heater, the T&P valve releases pressure or hot water if the temperature or pressure inside the tank exceeds safe limits.
How a Water Heater Works
Cold water enters the heater from the bottom.
The heating element (electric coil or gas burner) heats the water.
As hot water rises, it fills the top of the tank.
A thermostat regulates the temperature, turning the heating element on and off as needed.
Hot water exits the heater from the top via a pipe for use in your home.
Bonus Tips for Maintaining Your Water Heater
Drain and Flush: Regularly drain and flush your water heater to remove sediment buildup. This can help improve efficiency and lifespan. How often you need to do this depends on your water quality. If your water is hard, you may need to do it more frequently.
Anode Rod Replacement: Replace the anode rod periodically, typically every 3-5 years, or more often in areas with hard water. A corroded anode rod won’t protect the tank properly.
Temperature Setting: Most water heaters come preset to 140 degrees Fahrenheit (60 degrees Celsius). Lowering the temperature to 120 degrees Fahrenheit (49 degrees Celsius) can help save energy and reduce the risk of scalding.
Pressure Relief Valve Test: Test the pressure relief valve by lifting the lever periodically. This ensures it’s functioning properly and can release pressure if needed.
By understanding the components of your water heater and following these simple tips, you can help maintain its efficiency and lifespan. If you’re not comfortable performing maintenance tasks yourself, consult a qualified plumber.
Here are some additional tips for maintaining your water heater:
Insulate your water heater: This will help to prevent heat loss and keep your water heater more efficient.
Seal any leaks: Even small leaks can waste a lot of water and energy.
Have your water heater serviced regularly: A professional can inspect your water heater and make sure it is in good condition.
Replace your water heater if it is old or damaged: Water heaters typically last for 10-15 years. If your water heater is older than that, it may be time to replace it.
By following these tips, you can help to keep your water heater running smoothly and efficiently for many years to come.
