hot water radiator troubleshooting

soapstoneshelJanuary 25, 2014


My house was build in 1932 and has hot water radiator heat. I have bled the radiators that I can (on a couple of them, the fitting you open to bleed the radiators has been removed). A couple of questions:

Why would the fitting to bleed the radiators be removed?

Also having a problem with the two basement radiators. Basement is divided into two rooms. In the family room there are two radiators. I believe the system is called a one pipe system, that is one pipe goes across the top of the walls, and pipes come down to the radiators. When we first turned on heat, radiators in basement were warm and did not need bled. A few days ago the basement radiators stopped working. The pipe going across the top of the walls is still hot, and the top of the pipes coming down to the radiators is still hot. But the radiators are cold. We have had a couple of weeks of very cold weather here (western PA). Oh, and there is no air in the radiators, they are full of water. I've attached a photo in case that helps (our first winter in the house). The radiators have not been turned off and there has been no change in water pressure, as far as I know.

Any ideas? Many thanks.


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There is a bypass pipe from the supply to the return on this basement radiator. Apparently the water is whistling by the supply. Are there "Mono-flow" fittings on the supply and return to this register? A monoflow tee fitting has a sorts scoop that catches the water and forces it down to your radiator. You need one on both the supply and return. They have to be oriented correctly on both the supply and return. Water, like electricity, will take the path of least resistance.

    Bookmark   January 25, 2014 at 1:07PM
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Thanks for your response Jackfre. Do you think it's possible that I'm missing the monoflow fittings even though the radiators were working properly up till about a week ago? Thanks again.

    Bookmark   January 25, 2014 at 3:26PM
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