I drained my 20 pound Lee pot, then used an impact driver and a self-tapping #6 machine screw to plug the hole. It no longer drips and I use a dipper, now casting the 1st through hundredth bullets or balls perfectly -(I do preheat my moulds).
The handle of the old Lyman dipper is seen poking out from underneath the pot's left side. This pot used to be a bottom pour and is now a dipping pot only, as noted.
Shown is a hammer handle which I purchased (35 years ago) just for striking the sprue plate and now, for the last 20 years, it is only used for striking the handle's hinge to loosen balls that do not drop from the mould on their own. I wear heavy, lined leather work gloves for opening the sprue cutter gate.