Vacuum would do it, but the hose from the rad would have to fit a lot tighter than the one on my BX2380 does, plus the vent would have to be plugged, too.
I suspect some significant heat was involved as well.
Vacuum would do it, but the hose from the rad would have to fit a lot tighter than the one on my BX2380 does, plus the vent would have to be plugged, too.
I suspect some significant heat was involved as well.