Water Heater Parts

Narayani Karthik May 6, 2019
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Water heater is an important appliance found in almost every household. Several water heater parts function together to generate hot water. Let's see the types of heaters and their various parts.
Electronic devices have made life much simpler, but we are so dependent on home appliances. It is necessary to know the technical functioning of the appliances we use. Water heaters have an important role in our homes. They are made of many parts that work together to generate hot water. Here, we will discuss more about them.

Types of Water Heaters

There are two basic types if water heaters: tank and tankless. In a tank heater, there is a storage tank which is insulated and has a heating system installed in it. Cold water is supplied into the tank which is heated by the device. The hot water is then stored in the storage tank and is used whenever needed.
However in a tank-less heater, there is no storage. Here, the cold water passes through some heating coils and the hot water is supplied whenever needed.
A tankless device comes across as a better alternative to the tank variety. In case of a tank heater, the hot water is stored even when it is not required, so more electricity is consumed. Your device could run on gas or electricity.
Both the gas and the electric heater parts are almost identical, except that in case of the former there are no heating coils. Instead, there is a gas burner for the purpose of heating.

Parts of a Water Heater

►A heavy steel tank is installed in the heater. It is equipped to hold as much as 40-60 gallons of hot water. It is also designed to hold the pressure of the residential water system, about 50-100 psi, and the tank can hold about 300 psi. It is also lined with a bonded glass liner to keep the water away from any rust. The tank is well insulated.
►Then there are two pipes, an inlet and an outlet for the tank. The former is known as the dip tube which lets in the cold water. The outlet pipe is to let the hot water out of the tank.
►Then comes the thermostat, which is an integral part of most electrical appliances. It regulates the temperature at which the water is heated. Recommended temperature settings are between 120-140 degrees F.
►If your tank heater is electric, then there are heating coils inside. These coils are usually made up of copper or nichrome wire, because these wires offer excellent heat conduction with a high resistance to oxidation.
Meanwhile, if your device runs on gas (say, it is a propane heater), there is a gas burner which aids in heating.
►The water heater also contains a drain valve, which is used to empty the tank. This becomes important when the tank needs to be moved or some elements need to be replaced or repaired.
►As a safety measure, there is a temperature pressure relief valve (TPR) in the device. If the temperature and pressure exceed a certain limit, it releases water. If the pressure is not controlled, there is a chance that your device might end up exploding, which is extremely dangerous.
►To keep the storage tank from corroding, the water tank heater is equipped with a sacrificial anode rod that prevents any corrosion within the tank.
When you plan to get a heater for your home, decide on the type first and also on the size. Of course, if your home is small, you need to settle for a smaller device. If you are opting for a tank-less model, then you have the options of an electric or a gas device.
A tankless device will last for many more years than a tank. There is not much difference in the parts, with the only difference being that in tankless type there is no storage tank.