What must be included in the installation of new water heaters as per code?

The installation of new water heaters as required by code necessitates specific safety features to prevent accidents and ensure proper functionality. Including a release valve and drain pan is crucial. A release valve, also known as a temperature and pressure relief valve, is essential for the safe operation of a water heater. It helps prevent excessive pressure build-up within the tank, which could lead to a dangerous rupture or explosion.

The drain pan serves a protective function; it collects any leaks or overflows from the water heater and directs them to a safe drainage location, preventing water damage to surrounding areas. This combination of safety measures aligns with plumbing codes designed to safeguard both the property and the occupants.

While other options mention components that may be useful in certain scenarios, they are not universally mandated for all water heater installations. For instance, filters and expansion tanks, while beneficial, are not required for every installation and may depend on local codes or specific circumstances. Similarly, a thermostat and pressure gauge might be included in more advanced systems but are not a standard requirement. Finally, a connection to the main water line is necessary for function but does not pertain specifically to safety measures that the codes prioritize.