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Adding a Radiator to an existing one pipe steam system

Kat24Kat24 Member Posts: 1
I have a well insulated three season room that I am considering adding heat to to extend it's use through the winter.

On the opposite side of the wall adjoining the three season room is a steam radiator. I am wondering if it is ok to replace the current L joint to the existing radiator with a T joint, and then have a pipe added to run from the T joint through the wall to a new small radiator to heat the three season room? The additional piping run would be no more than 2' long. The three season room is approximately 200 sq feet. So in other words I'd have two radiators running off the same pipe.

I am researching ideas as this is a job I'd have to hire out. Which brings me to a second question -- who do I call to work on an older rad steam system? Is this a job for a plumber or should I be looking elsewhere?


  • Hap_HazzardHap_Hazzard Member Posts: 1,349
    The trouble with tees

    is that the pipes connected to both ends can't slant down towards the main, so your condensate won't be able to return quickly enough to get out of the way of the steam. Also, you'd be connecting two radiators to supply piping that was only intended for one.
    1983(?) Peerless G-561-W-S
    3" drop header, CG400-1090, VXT-24
  • JStarJStar Member Posts: 2,668

    You should consult a steam pro. Where are you located? We may know somebody nearby.
    - Joe Starosielec
    [email protected]
  • SnowmeltSnowmelt Member Posts: 750

    Need a heating mechanical company.

    Here's one thought you the wet return and a S.S. Circulator and run a hydronic system in that room.

    Just a thought
  • BobCBobC Member Posts: 4,409
    If your really lucky

    And the radiator feed pipe is large enough to feed both radiators.

    And it can be piped so BOTH radiator feeds slope back towards the boiler.

    And the radiator is close to the boiler so you can add a drip to this pipe so you can increase it's steam carrying capacity and get rid of the pesky condensate.

    Or maybe you have to convert one or both those radiators to two pipe.

    Or maybe it would be easier to make the new radiator a hot water radiator.

    This may be more involved than you think so it would be best to have some expertise handy so it works like you want it to without having to do it again.

    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
  • Charlie from wmassCharlie from wmass Member Posts: 3,920
    yes you can add a radiator IF

    the run out is the right size, you can tie in to a location the condensate can drain to, the boiler has capacity to supply the added load. Some plumbers know steam.
    Cost is what you spend , value is what you get.

    cell # 413-841-6726
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