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can't identify cause of noise in radiator
The 1-pipe steam radiator in my bedroom makes a lot of racket as soon as it gets steam, which is usually at about 4am. It’s infuriating. The thermostat is set to come on at 64F and off at 66F. I put on a new Hoffman vent. I have the radiator pitched towards the supply valve. I checked the valve body to see if the seat/gasket came apart and might be blocking condensate flow (it not, and its fully open). I stuffed pieces of plastic milk carton around the supply pipe and hole through both floors it passes through. I traced the horizontal pipes in basement and verified that they all slope towards boiler. I verified that steam pressure is 0.5 with a differential of 1.0. I verified that the pig tail is unobstructed and that the water is clean and not surging. As soon as steam gets to the radiator, it starts pinging. And I do not mean little quite pings but more like someone whacking the plastic handle end of a large screwdriver on a radiator section. After about 80 pings (about a ping per second), it goes quite for about 2 minutes, then the damn pinging starts again, but maybe about 50 pings this round. Then it goes quite for a minute or two, then the pinging starts again one last time, maybe about 15 or 20 pings, then it gloriously goes quite for good. Of course I am now fully awake and pissed off and can’t go back to bed. I can’t just switch the offending radiator with another in the house, because the others are in in my kids rooms, or are downstairs and the damn thing weights about 500 pounds and I am old. Am I overlooking something? Maybe the sections have gotten out of whack? The nuts on the tie rods are coated in about 120 years of paint and rust. Do I dare to mess with those? Should I just move?