Where do you Install gas water heater?

Usually very simple. -But first, you should have (or be able to fit) a GFCI in the enclosure to plug it into.

You will need an electric drill, a hole cutter, small pipe cutter, two crescent wrenches and a multi screwdriver. - First I find an easy place to attach the main tank so you can work around it. Now you need to drill the hole for the dedicated faucet that comes with it and attach the faucet in place. Now, again depending on make, you cut the incoming pipe and attach it to tank, run outlet pipe to faucet. - There are 3-4 types of these so it varies at this point, some need a TEE . For any water fittings you need for these -Sharkbite are best. ALL Heaters have Excellent instructions so READ and follow their instructions.