The Lochinvar flange is designed for compatible EnergyRite ASME heater applications where a 2 inch water connection flange needs replacement. A flange is useful because it helps create a secure joined connection point, supporting dependable plumbing attachment and cleaner heater installation.This replacement is especially useful when the original flange is cracked, corroded, damaged, or no longer sealing or fastening correctly. Matching the correct 2 inch water-connection design helps preserve intended fit and dependable performance.The 100288537 is a practical service part when a compatible Lochinvar EnergyRite ASME heater needs a flange to restore dependable water-connection support. Lochinvar water-connection flange Fits compatible EnergyRite ASME heater applications 2 inch size Useful when the original flange is damaged or worn Supports cleaner and more dependable plumbing connections