Plugs size for Ping tanks

[Ck2hans]

Anyone know the proper size plugs for plugging the ping tanks after removing the drain valves?

Chuck

[Joe Camper]

If u remove the reducer that the drain cock threads into, and I would, its a 1/2 in pipe plug replacement. Once u remove the drain clock with an adjustable take a 3/4 socket and impact to the reducer. Put schmutz on both Male and female threads.