Some tasks are risky or have the potential to severely damage the plumbing system in your entire home. Beyond that, working with a professional plumber has several wonderful advantages that justify the expense. The typical lifespan of a water heater is 6 to 10 years. To avoid water damage to your property, it is a good idea to replace them before they fail. Choose the most cost-effective water heater possible because they have several advantages over conventional models. Since tank water heaters can take up a lot of space, you need to have enough of space. However, modern water heaters are so compact that installing a tankless unit only requires a space of less than 3 feet. These water heaters can be put on a wall so that they don't need a specific space.