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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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copper-plastic-copper - any drawbacks?
Virtually all my plumbing will be threaded through studwork, so
plastic pipe is by far the easiest. But some runs have to be copper, e.g. boiler to thermal store, vent pipe from store etc. Other bits would be better in copper for the rigidity/robustness e.g. exposed pipes up to appliance taps, network of stuff supporting pumps etc. So that would mean overall, almost every pipe run (hot, cold, heating) will be a mixture of plastic and copper. I can't see any disadvantages to this, I've used plastic a lot with never a leak I can recall, nor any leaks in solder-ring fittings in new copper pipe (and very rarely a leak in reworking existing copper pipe - though compression fittings have occasionally had hard-to-cure drips). So I can't see a downside to mixing plastic and copper as appropriate - anyone think differently? (Obviously such earth bonding as necessary will be done around boiler etc - and there's no need I can see for electrical continuity on any of the pipe runs) |
#2
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copper-plastic-copper - any drawbacks?
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#3
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copper-plastic-copper - any drawbacks?
I made the transitions between copper and plastic with standard brass compression fittings rather than plastic pushfit stuff for robustness. Never tried that. Always used pushfit for copper to plastic, and never had a leak, even where I've cycled the same mains-pressure fitting several times - though I can understand the feeling that those tiny stainless steel teeth in a plastic compression don't seem an awful lot of substance to hold it all together. |
#4
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copper-plastic-copper - any drawbacks?
On Tue, 20 Oct 2009 02:43:05 -0700 (PDT)
" wrote: Virtually all my plumbing will be threaded through studwork, so plastic pipe is by far the easiest. But some runs have to be copper, e.g. boiler to thermal store, vent pipe from store etc. Other bits would be better in copper for the rigidity/robustness e.g. exposed pipes up to appliance taps, network of stuff supporting pumps etc. So that would mean overall, almost every pipe run (hot, cold, heating) will be a mixture of plastic and copper. I can't see any disadvantages to this, I've used plastic a lot with never a leak I can recall, nor any leaks in solder-ring fittings in new copper pipe (and very rarely a leak in reworking existing copper pipe - though compression fittings have occasionally had hard-to-cure drips). So I can't see a downside to mixing plastic and copper as appropriate - anyone think differently? (Obviously such earth bonding as necessary will be done around boiler etc - and there's no need I can see for electrical continuity on any of the pipe runs) I just repeat usual my warning about little rodent teeth. Plastic is all very well, but.... R. |
#5
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copper-plastic-copper - any drawbacks?
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