Greetings - any advice on some possible piping modifications I am considering would be most appreciated here. I have a one-pipe steam system, that previously had absolutely no venting (except on the radiators themselves). After reading Dan H's books, and from advice on a previuos post about my system, I (and contractor) added some Gorton vents to the main, actually two submains, where I was getting little heat. The system is not the best design (as I have been told on this form), but short of a lot of repiping, I am stuck with the main ending at a T, and then splitting to two sub mains, each with two radiators (one first floor and one second floor). These are the sub mains that we vented. Now, I get quite a bit of hammer, especially on start-up. It is pretty obvious that condensate water is now pooling. I am pretty certain that it is pooling at Tee's which split from the sub mains and feed the lower and upper radiators on each side....again, two sides are same, with a T off the sub main, supplying a first floor and second floor radiator. These Tee's are vertical coming off the sub main, and one even looks like it may tilt back toward the sub main (causing the condensate to pool and hammer??). I am considering repiping these Tee's coming off the sub mains, and replacing with separate 45's off the sub main instead, so that:
1. each radiator condensate feeds back down to the sub main separately, so only half the condensate will feed back to the sub main (each radiator condensate has it's own path back to the sub main).
2. the condenstate is flowing back down a 45, instead of trying to get through a vertical T, and then making a 90 degree turn into the sub main.
OR, for repiping, could I 45 off the sub main, and then 45 from one radiator feed to the other? And then control steam to each radiator by adjusting my Hoffman vents (one being fast steam venting and one being slow steam venting)?
I can take a few photos and post them tomorrow, to provide a better idea of my piping.
Thanks in advance for any help!