I live on the top-most floor of a NYC apartment building. Our apartment has, in total, 5 vertical "floor to ceiling" pipe heaters. It's not that they don't heat the apartment properly; it's that they make unbearable sounds (loooud whistling). If I could, I would include a video of this mess. We just moved in a couple of weeks ago, and these Godforsaken tea kettles have woken me up practically every night I've been there.
So I've got a few questions for you guys. The vents take 15-20 minutes to empty whatever air's in the pipes, which seems kind of long. The nozzles on each of them (pictured below) are 41 Hoffmans, with holes 1/8 inches wide. Is that big enough for this type of line? And are these the building's main lines? I suspect that they are, as the landlord has said that, if I were to "turn one off," the resulting radiators connected to it would turn off as well. Also, would a building of this size have a one or multi pipe heating system? (That question, admittedly, is a little left field, but it's a curiosity of mine.)
But so I wanted to try out a larger air venting valve, like a Gordon #2 or a Hoffman 75. Does that make sense here? Do I run the risk of water spraying out of the ventilation hole if it's too big? When I suggested to my super that he "widen the hole" (not knowing what a main line valve was or what, generally, I was talking about at the time), he said that would cause "400 degree water to spray everywhere" and that these valves all come in one size (1/8 inches, presumably). I don't know if what he said regarding the water was true (though I think he inflated the temperature a bit), but seeing as how I now know his second statement was false, coupled with the general impression I have of this guy, I get the feeling that he doesn't have much plumbing experience. So I guess my final question is is it OK/safe to buy and then try connecting one of those valves on my my own?