In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Looking for experienced advice:
Cold, two-pipe steam radiator next to outer wall. Trap new in 2009, wet condensate in trap and draining. Trap is open.
Steam enters supply valve but doesn't seem to be migrating into radiator. I even loosened the trap cover just enough to allow air to escape when steam came up; I got a 'hisss' but steam did not fill the radiator. First section gets luke-warm.
Supply valve says open. Any ideas before I detach the supply valve to inspect?