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how does the water flow through my radiator

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dronic123
dronic123 Member Posts: 13
I have a cast iron hot water radiator with the supply and return piped at the bottom of one end of the radiator. What path would the water take inside the radiator? And would the path cause the same heating pattern as shown in the recent post "flow through a cast iron radiator"?

Is this "twin" type of piping indicative of steam system in the past or perhaps water right from the original install?

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  • mattmia2
    mattmia2 Member Posts: 9,660
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    Do you have a picture? There are valves with a lance or scoop built in to allow supply and return to connect to one tapping of a radiator. It usually doesn't indicate a conversion, just that someone bought in to one of these products when they installed the system.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,532
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    Post a picture. Sounds like a hot water radiator. Some of them had special double flow fittings
  • dronic123
    dronic123 Member Posts: 13
    edited February 19
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    I cant seem to add a picture easily
    https://imgur.com/a/ppHAbb3
    mattmia2
  • mattmia2
    mattmia2 Member Posts: 9,660
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    Oh, that is interesting. It is a special radiator. Never seen one like that before with 2 tappings at the bottoms of one end.
  • hot_rod
    hot_rod Member Posts: 22,151
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    If you are looking for a new toy, gadget or tool, these IR adapters for smart phones have all sorts of uses around the home.

    Finding air leaks around the outside of the home alone can be worth the $$.

    You could watch that radiator warm up and see the flow path.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    mattmia2
  • dronic123
    dronic123 Member Posts: 13
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    Is the Unit called "ir remote control adaptor on (amazon)?
  • hot_rod
    hot_rod Member Posts: 22,151
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    A lot of HVAC shops have a small camera like this on every service truck. The Flir one seems to be a popular model from one of them IR industry leaders.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • dronic123
    dronic123 Member Posts: 13
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    would perhaps one of the tubes be routed to the top and the return tube takes from the bottom---- originally in a gravity system?
  • mattmia2
    mattmia2 Member Posts: 9,660
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    There may be a lance connected to one of the fittings but most likely it just circulates by convection within the radiator.
  • Grallert
    Grallert Member Posts: 644
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    If it operates anything like a Single Entry Radiator Valve the supply side will have an extension tube inside the radiator, Maybe extending past the second section. I'm not sure how necessary this would be or is but that's my suspicion.
    Miss Hall's School service mechanic, greenhouse manager,teacher and dog walker