Duro Dyne bang-in insulation pins come loose and t...

Duro Dyne bang-in insulation pins come loose and the washer is a perfect size to roll into the mouth of a 3/4" drain fitting causing ac condensate overflow problems. The weight of the water "seals" the fastener to cover the hole. The pin makes it roll back and forth and zig-zags it's way right to the drain hole. These would be better if they had flat chords cut on two opposite sides so they don't roll.