Do you have problem with your water heater?. Is it broken?. Well, you have to fix it, or you probably need to replace it with a new one. Replacing water heater is a basic plumbing job. But, you have to be more careful, when working with the stuff. there are some dangers involved when you are working with a natural gas. To complete is safely, here is how to replace a water heater.
Remove the old water heater, so you can install a new one. Provides a fire extinguisher nearby. Begin shutting off the gas valve with a wrench. Make sure and verify that there is no gas leaking by first visually inspecting the pilot light, that burns off shortly. If you do not find a leak, turn the pilot off, and disconnects the exhaust duct located on top of the tank. Never use flame to detect a gas leak. Shut the cold water off in valve, release the water. It will make the heater lighter and easier to remove. Use a large pipe wrench to disconnect the gas line from heater. Once the fitting is disconnected, check that the gas is not escaping remove the valve assembly, completely drain the water, it is out with the old and in with a new one. Connect the new segment of flex pipe.
Connect the new flexible gas line to the pilot box. After threading the fitting of the pilot bix, tighten it using wrench. With another layer of the Teflon dope, tighten a new fitting on the gas supply. Connect water heater to the water supply. You have to transition the water valve that is removed earlier. Once the correct assembly is achieved, solder it using a propane torch to apply even heat. Solder a new union between the valve assembly and the incoming supply pipe. Fill the water and connect the gas flex-line and reattach the duct and draft hood to vent the heater. Tips on how to replace a water heater is probably not really helping. However, you can try it at your home.