Here is the Hot Water Tank Installation Instructions
Have a go at it. Tanks are simple to install
First step is to buy a new hot water tank. If yours was working fine then just order one that is the same size. If you found yourself a bit shy of water when the whole family wanted to shine up, buy one a bit larger. They rate them by Gallons In the US. So if you have an 80-gallon tank that’s not cutting the hot dog, get one that’s 100 gallons. If you plan on putting in a hot tub in the near future then do some research and find out how much capacity you will need to still have hot water after you install your new tub.
Next we need to come up with some tools. The typical will do, hammer and screwdrivers, we will also need some pipe cutters, pipe wrenches (two at least) you might want to have a few large crescent wrenches around as well. A garden hose will be handy.