The answer to 'how does water heater installation work' is that installing a new water heater typically involves several steps. First, the old water heater must be disconnected from the plumbing and electrical or gas lines. Then, the new water heater is positioned in the desired location and connected to the necessary utility lines. Finally, the water heater is filled and tested to ensure proper operation.
The specific installation process can vary depending on the type of water heater (electric, gas, or tankless), the size and configuration of the unit, and the existing plumbing and electrical setup in the home. In many cases, it's recommended to hire a licensed and experienced plumber to handle the installation to ensure it's done safely and correctly.