I am renovating an old apartment here in Berlin/Germany (built in 1957 I believe) that is connected to the central heating of the entire building. It has an old valve at the pipe that is connected to the main pipe (in the wall) that continues to the apartments above.

I want to close the valve so that the apartment is cut off from the central heating and so that I can replace all old heating pipes and radiators in the apartment.

My guess is that I need to close the small screw in the middle, but it will only screw loose until it comes out. I can't seem to screw it further in to close. The screw seems very weak and I don't want to force it too much. Also the whole part around the center screw can be removed (see images).

Do I need to heat the pipes to loosen something? Or will I need to freeze the pipe to cut off the valve and install a new one?

What else can I try?

Heizungsventil1 Heizungsventil2 Heizungsventil3

  • 1
    From the first picture you are probably missing the handle. The last picture does not seem to be leaking/ water flowing out, so maybe there is another shut off valve before this that is off. If any building maintenance people for the building they might help.
    – crip659
    Commented Apr 17, 2023 at 17:01
  • Even if you could get this to "work", I wouldn't trust it to keep working, or to be able to be reopened once you are done. Better to just cut it out and install a proper shutoff now.
    – Armand
    Commented Apr 17, 2023 at 17:17
  • Thank you for the comments. The pipe is warm so the heating water is flowing through it. The problem is, to replace it, I would either need to freeze it, or drain the water from the whole central system of the apartments above I believe. I don't know of any other way.
    – MPS
    Commented Apr 17, 2023 at 17:20
  • do you have the key to use on. the the valve. My problem was they do not stay on the valve, so I kept loosing them
    – Traveler
    Commented Apr 17, 2023 at 18:16
  • What part did you remove on the last picture ? to check if there is pressure in the system, open one of the vent valve on the radiator
    – Traveler
    Commented Apr 17, 2023 at 19:04


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