The Eastman 20-in. inner diameter (22-in. outer diameter) water heater drain pan prevents permanent damage to nearby fixtures and floors caused in the event of a water heater leak or runoff. A drain pan is a great investment that when properly installed will catch any leaks saving you a lot of money in costly repairs. The pan is built with aluminum for extra strength and durability. It is designed for use with gas water heaters. The drain pan includes a 1-in. PVC drain fitting for easy connection to a drain pipe through a pre cut side opening.