How Do Gas Tank Water Heaters Work?
State gas water heaters heat water in one of two ways. They can either burn natural gas or LP (liquid propane). All models allow the user to set a desired temperature for their water. When hot water is needed, cold water enters the tank through an internal "dip tube," which allows it to enter the bottom of the tank, trigger the thermostat and open the main gas valve. As it heats, the water rises to the top to exit the tank through a hot water supply line. A pilot light also aids the process for standard gas models. When the thermostat reaches a temperature where reheating is required, the pilot light ignites gas that has flowed to the burner (high efficiency models use an electronic gas valve instead). The heating process stops when the water is heated to the desired temperature and the main gas valve shuts off.
However, the heating process produces exhaust gases which must be vented to the outdoors. Different styles of gas heaters have varying venting requirements. A plumbing contractor can help you find a water heater that both fits your lifestyle and home ventilation requirements. You can also use the State online XPERT™ Product Selector to find which type of water heater is best for your home and needs.
Innovative technology helps all State gas tank water heaters remain durable for years to come. A glass coating lines many of the tank models to protect the steel tank from corrosion. These tanks also use an anode rod that neutralizes harmful elements that may damage the glass lining and steel tank. The water heater's temperature and pressure relief valve serves as a safety device. It can detect and relieve internal temperature or pressure if the tank begins to exceed safe limits. These features help your water heater work to operate powerfully and reliably.