A water heater can be what type of connection?

A water heater can be connected using different methods, and the practice generally allows for both hard piping and flexible connections. The correct answer recognizes that flexibility in installation is crucial for accommodating various plumbing systems and ensuring ease of maintenance.

Hard piping provides a more rigid and permanent installation, which is often desirable for long-term reliability and longevity of the water heater. On the other hand, flexible connections allow for easier installation and removal, which can be advantageous in tight spaces or when servicing the unit.

By allowing both options, codes and best practices ensure that plumbers can choose the appropriate method based on the specific circumstances of the installation site, such as space constraints, accessibility, and the particular type of water heater being installed. This versatility helps ensure that the plumbing system functions properly while meeting safety and building regulations.