Copyright © 2008 Water Heaters Express, LLC All rights reserved  | P.O. BOX 5034, RICHMOND, CA 94804  | 510-717-1965
Water Heaters Express  |  website design by aubrey
If you own a house, you own a water heater. You probably don't spend much time thinking abou­t the water heater until, one morning, you go to take a shower and there's no hot water. Then you probably think about it a lot.

And if you're the curious sort, the following water-heater question may have crossed your mind: "How can the water stay hot if cold water comes in as soon as you start using the hot water?"

Inside a Water Heater
If you were to cut a water heater in half, you would find that it looks something like this (electric on the left, gas on the right):
























A gas water heater is nearly identical to an electric water heater, except that it does not contain the two heating elements, but instead has a gas burner at the bottom, with the chimney running up through the middle of the tank.

A water heater consists of the following parts, as shown in the figure above:

A heavy inner steel tank that holds the hot water

Typically, this tank holds 40 to 60 gallons. It has to be able to hold the pressure of a residential water system, which typically runs at 50 to 100 pounds per square inch (psi). The tank is tested to handle 300 psi. The steel tank normally has a bonded glass liner to keep rust out of the water.


Insulation surrounding the tank

  • A dip tube to let cold water into the tank

  • A pipe to let hot water out of the tank

  • A thermostat to control the temperature of the water inside the tank (Many electric water heaters have a separate thermostat on each element.)

  • Heating elements to heat the water (These are the thick electric elements similar to those you see inside an electric oven.)

  • A drain valve that allows you to drain the tank to replace the elements or move the tank

  • A pressure relief valve (This is an important safety feature that keeps the tank from exploding.)

  • A sacrificial anode rod to help keep the steel tank from corroding

The thermostat controls the temperature of the water inside the tank. Normally you can set the temperature between 120 and 180 degrees Fahrenheit (49 to 82 degrees Celsius). It is generally recommended that you keep the temperature between 120 to 140 degrees F (49 to 60 C) -- especially if there are children living in the house -- to prevent scalding. It also saves energy.

Normally, the thermostat is underneath a cover plate and it has a knob or a screw that you can use to set the temperature.

The thermostat controls the temperature of the water inside the tank. Normally you can set the temperature between 120 and 180 degrees Fahrenheit (49 to 82 degrees Celsius). It is generally recommended that you keep the temperature between 120 to 140 degrees F (49 to 60 C) -- especially if there are children living in the house -- to prevent scalding. It also saves energy.

Normally, the thermostat is underneath a cover plate and it has a knob or a screw that you can use to set the temperature.

Water Heaters Express can help you with any of your water heater needs! Give us a call today!
Source http://www.howstuffworks.com/water-heater.htm
Call Us Today!
1-866-WHEXPRESS
(943-9773)