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Water hammer, no heat, puking rad on one line
Steam nube armed w/ D.H.'s books... 1856 home, newer steam boiler (2010) heats great except for 3 rads at end of house. Water hammer in this line, takes forever to eventually get these rads to heat... rest of the house gets way hot by then. What I've done: Discovered zero main vents, added Gorton #1 toward end of troubled line where I found a plug. There are 2 other plugs, one near the end of another line where it turns upward through the floor and one in the piping near the boiler. Replaced 10 of 11 rad vents with Gortons sized to slow flow near the t-stat and to speed flow on troubled rads. Added insulation to some bare fittings in the basement, adjusted the pitch and straightened the (sagging?) troubled line as best I could. Removed & cleaned pigtail, drained some water at bottom of Hartford loop. Just had boiler cleaned & serviced. Pressuretrol set @ about 1/2 psi and diff looks to be set @ 1psi.
Had Gorton 6 on likely the most troubled rad and it puked about a quart of water on its way to heating up. Replaced with a good (I think) Doyle vent, adjusted to 10, to stop the puking. I pitched this rad (was dead level) by raising about 1/2 inch on far end but didn't help.
We cannot leave system on overnight cause it wakes everyone up.
TY in advance for any guidance. (I do have some nice steam porn from this house that I'd love to share along with pics of system but how do I add pics???)