Gas hot water can be installed indoors or outside according to the customer requirement. Hot spots are created due to the mineral present in the tank. Therefore, the tank will be damaged and the functions will show signs of failure. Plumbers will either repair the unit or replace the gas hot water system. Below are some important factors related to gas hot water replacement. https://www.bluemountainsplumbing.net.au/service/gas-hot-water-system/