Product Description Simplify your plumbing projects with the Eastman aluminum water heater drain pan. Water heater pans are designed to prevent permanent damage to nearby fixtures and floors caused by water heater leaks or runoff. Made with heavy-duty aluminum for long-lasting reliability, this water heater pan includes an inner diameter (ID) of 20 inches with an outer diameter (OD) of 22 inches. This drain pan includes drain fittings for easy installation and is designed for gas water heaters. From the Manufacturer Eastman Aluminum Water Heater Pans are designed for gas water heaters. These drain pans are available in a variety of sizes. All water heater pans include drain fittings for easy installation.