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Hi Taifur,I am not saying it is illegal in your country but the UK is a much regulated country. Seem to have need for permission just about to do anything. Also we have water meters to contend with.Rod.
Rain water generator is a good idea.
Fine, that is OKAY.I wish you good luck.
I personally have no care what someone does to generate electricity.I am only the messenger and some may say the Devils Advocate. I do know that water suppliers would not allow this on a larger scale if a household supply is being pressurised by their pumps. Whilst I agree on a small scale it seems harmless enough although I expect the UK regulations do not make any provisions for even small scale generators as opposed to larger generators. Anyway I shall not argue the case I was just pointing out that many small scale systems could add up if everyone did it. Regulations in the UK are likely to be similar in many western countries. Good luck if it is allowed.
This seems a good idea but you will find this is illegal in the UK. You cannot use a water supplier's water pressure to generate electricity. I have seen a similar set up proposed on the internet before and someone pointed out it was illegal. I would say it is likely to be illegal anywhere unless it is a private supply drawn from your own spring.