I used to have a central heating system which was never in use for years, because it couldn't be connected to central pipe inside other building. Last winter I finally dropped water from it and cut all pipes. Now there is heating season coming, and some of pipes need to be clogged in order to prevent water coming from lower floors. What material (plaster, sylicone etc) is most appropriate for this?
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3Why not thread the cut pipes and screw on pipe caps?– Dan D.Commented Oct 8, 2014 at 11:05
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2You should definitely use an appropriate cap to seal the pipes. Filling them with random materials, is not the way to handle this.– Tester101Commented Oct 8, 2014 at 11:33
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I know, two of them were threaded and caps were put, but rest of them were cut too near to the wall so the threading device couldn't make thread to screw the cup. So that is why I need to clog the rest of them. However, solution proposed by craftsman was to weld them, but it is too risky because it is attic all made of wood.– cincplugCommented Oct 8, 2014 at 15:27
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So, let me rephrase: can you suggest either some material appropriate to clog pipe ends, or some way to put cups without threading pipes?– cincplugCommented Oct 8, 2014 at 16:12
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1thing is, your heating system runs under pressure. Pressure likes to pop things off. If it is not screwed, clamped or welded it is going to push the blockage out. And it will probably do it in the middle of the night or when you are away for a long weekend flooding your home.– dicelessCommented Oct 8, 2014 at 16:20
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