What is a hot water heater pan?

A water heater pan is a shallow basin designed to catch water and keep it near the base in case the unit starts leaking or the temperature and relief (T & P) valve releases water. They come in plastic, aluminum, or steel and run about $30. They are often required for those with tank water heaters. You’ll want to check with your local plumbing codes to be sure.

Leaks typically start small. So although a drain pan won’t hold anywhere close to the amount of water an entire water heater can hold, it can provide you with protection from further damage until you discover the leak and repair it. This is why it’s important to check your drain pan regularly.