Recently I had the great privilege of working for a client that wanted to preserve an existing vapor system. This was in spite of the fact that they are planning on raising the roof and adding a small addition to their kitchen – a perfect time to modernize the heating system. They hadn’t moved into the house yet, and it was the winter, so they wanted to get some heat going so they could spend time there working and planning.
I realize that some of what I write below will be too technical for a lot of my readers. Just skip those parts, or write me a note if you want clarification and I’ll do what I can.
The existing boiler was no good. It was a gas boiler that looked like it had leaked quite a bit, and wasn’t firing right when it had been running. So the boiler had to go.
This particular vapor system was a Richardson system, which utilized specialized fittings on the return on each radiator, rather than the modern steam traps. These return ells are not available today (and probably haven’t been for 70 year or so), so we had to determine what to do with them. On examining each one, we discovered that the only thing that appeared to be wrong with them was that they utilized a brass ball as a sort of check valve, and over the years a lot of them had gone missing. Otherwise, they appeared intact, as did the metering supply valves. We could have chosen to just install steam traps at each radiator, but the owners and I really wanted to make the system work the way it was designed. To restore it as much as possible.

There were a few radiators that hadn’t heated when the boiler was running, in fact one of those areas had some baseboard hot water heat installed as a supplement to the heat. And I noticed that at least 2 radiators had NO steam trap or Richardson return elbow on them, which means that the return system was full of steam and steam pressure.
I did heat loss calculations on all the rooms, and it appeared that the room with the baseboard supplemental heat had a radiator that WAS big enough, so it was apparent that it just wasn’t heating. The bedrooms were a little under- radiated which is unusual, but we decided that once we got all the heat working properly they could live with them and see how it was. But that cold room needed to work.
The first thing I did was to go onto HeatingHelp.com and contact some of my steam heating peers and betters to see if anyone knew about the Richardson return ells No luck. Then I googled Brass balls. You can only imagine SOME of the sites that I found, but I did finally find a manufacturer that makes them and would ship to us.
The steam pipes in the basement had some really thin, cheap insulation on them, and a lot of the hangers had been removed when the cellar was “fixed up” by a previous owner. So the pitch wasn’t exactly what it should be. Also in the basement were a bunch of walls and a nasty bathroom that the new owners wanted nothing to do with, so being more than just a heating contractor, we offered to remove all that stuff as well while removing the boiler.
After all the study and research, this is what we did:
We installed brass balls in the ells that were missing them.
We serviced all the supply valves with grease and freed them up.
We removed 2 radiators that had been added without steam traps. These areas will be heated by whatever heat goes into the remodeling part of the project.
We installed a steam trap on the return from a recessed radiator that didn’t have one. All the radiators now had Richardson ells or steam traps.
We installed a new Burnham 5 section steam boiler, using a 3 inch 2 inlet drop header to make sure the steam was slow and dry. W installed a 2 inch equalizer line and Hartford loop. We insulated all the boiler piping.
We installed a steam trap at the end of the main, and made a manifold of 3 vents on the return main to remove the air quickly from the steam main.
We removed the thin insulation from all the mains, and all the walls and the bathroom from the basement, and re-hung the mains and returns with the proper pitch. We supplied the owners with new insulation for the mains, which they wanted to install themselves.
We installed a Vaporstat in place of the Pressurettrol that came with the boiler so that he system could run on very small pressures.
I am happy to report that it all works like a charm. The system is very quiet, and it runs great on less than a pound of pressure. All the radiators heat right up, and even the room that had the baseboard has plenty of heat now that the system is working the way it should.
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Tags: Banging pipes, energy efficient heating, gas fired boiler, piping noise, residential remodeling, Steam baseboard heat, steam boiler maintainence, steam headers, Steam Heat, steam system problems, Vacuum heating, Vapor heating, Vaporstat