On my one pipe system 3 out of the 8 rad valves are leaking steam at the valve. They need to be repacked. Any ideas on which packing I should use before I start wandering around the plumbing supply store?
Both for the stem and the seat connection just under the stem.
I just repacked my radiator shutoff valves a few weeks ago, and found they loosened up. I think the string settles in after a few heating cycles requiring the re-tightening of the nuts to seal the valve stem.