Can you put a plug on a hot water heater or does it have to be hard wired?

A hot water heater typically cannot be plugged in like a standard appliance; it usually needs to be hardwired for safety and compliance with electrical codes. Hardwiring ensures a stable connection to the electrical supply and can handle the high wattage requirements of the heater. Some portable or smaller units may have plugs, but these are exceptions rather than the norm. Always consult a professional electrician for installation to ensure it meets local regulations.