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Making a couple changes to a steam system in a new house, looking for confirmation
I recently moved into a house with steam heat and I've been learning about it. The pressure gauge that was on there didn't have a pigtail, and I don't think it was particularly accurate (it sat at 3 or 4 psi when the system was off and cold, which didn't seem like a good sign). I put together a setup to both add a pigtail and to add a 0-3 psi gauge. I also added a ball valve to keep that 0-3 psi gauge isolated except when I want to use it. I don't have that gauge yet, so there's a large 0-30 psi gauge in its place at the moment (in the picture). Does this setup make sense? Also, I used RectorSeal No 5, which is recommended a lot and seems appropriate for the purpose based on their info. Are there any changes that I should make?
I also added some main vent capacity. I put on two Gorton No 2s, which is certainly enough to handle to size that system we have. And other than cost, I don't think there's any downside to having extra venting capacity. Plus, if one of them clogs, the other can still vent the system (there was only one main vent before). Does this setup look reasonable? I know it shouldn't really be coming off the end of the return right before it drops, but changing that seems like a much more major change than I'm prepared to try right now. Also, the vents do fit there, but there isn't a lot of room above them. It looks like they vent from the top, but off to the side. Is being an inch or so from the ceiling above them a problem?