Hired a new company to close the pool last year. I had a heck of a time finding where they placed the drain plug to the heater, but I finally found it. I put teflon tape around the threads and screwed it in. Once the pool was fired up, water started pouring out where the drain plug is installed. The plug is from a Raypak 266A heater. Does anyone know if this plug is supposed to have a gasket on it, or any idea why it is leaking? It is two years old and has never leaked. Really appreciate your help, as I can run the filter this leak.