27 years of pool ownership in the north east and have never blown out center drain, I drain pool below return lines plug return lines I dump about a gallon of pool antifreeze per return line @2 and a gallon in the skimmer 1/2 before gizmo 1/2 after gizmo install. then another gallon goes in piping for center drain. Never had an issue.I drain the water below the skimmer and remove all the pool hoses and equipment every fall to store them inside the shed
I then blow out the center drain to help protect it from freezing
The gate valve is merely to shut off water to and from the center drain, for maintenance and for winterizing
I.meant plug it on the pool side. Trying to put that in the pipe then remove it with water coming through feels like it will be more than mildly frustrating$5 stopper.......I am going to slow trim it back until it will fit through the fitting
