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    One pipe central heating system

    I recently made a start at converting my old 1-pipe system. See: https://www.diynot.com/diy/threads/one-pipe-central-heating-improve-and-add-a-rad.497803/#post-4092401 So far, I've converted 2 radiators and the difference is immense. They heat up 10x quicker than before, and get a good 20 deg...
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    One pipe central heating -- improve and add a rad

    Thanks, Zmicer. I think I'll be gradually replacing it with a 2-pipe. But something like that might help a bit in the short term... One thing that bothers me, especially having a condensing combi, is I suspect quite a lot of the flow is just going round the loop without entering the rads, so...
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    One pipe central heating -- improve and add a rad

    I see your point re balancing -- thanks! How about this: if I drop from above for the hall and downstairs loo (i.e. proposed mod 1) directly from the main 22mm flow and return, close to the boiler, and just leave the rest alone for now (leave the lounge bypass as-is), would that be a...
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    One pipe central heating -- improve and add a rad

    Thanks for the warning! Can you elaborate a little as to why it might screw it up though? As far I see, this is basically a poor-man's conversion to a two-pipe system, with the caveat that there are 3 rads in series?? I agree a proper conversion would be ideal, but with the tiled/wood floors...
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    One pipe central heating -- improve and add a rad

    I have an ole 1 pipe system which is performing quite poorly downstairs. The issues are the lounge and hall take a long time to heat up. I'd also like to add a small rad to a downstairs loo. The system is sketched in the attached. The area under the red box is inaccessible due to wood flooring...
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