How long can I store water in a rainwater cistern?

But these are one-time costs and negligible in the long term.

Well, if 2-5k€ are negligible for you... good for you. Unfortunately, not for me.

The potential savings are simply far too low.

I just want to point out that a cistern is increasingly a hobby. It never pays off.
If it is required by the municipality, of course, it is a different matter.

Best regards,

Andreas

I just want to point out that a cistern is increasingly becoming a matter of passion. It is never worthwhile.

The question in this thread was not whether a cistern is worthwhile or not, but whether he should take 4,000L or 8,000L.

Hello,
I would like to sincerely thank everyone for the lively discussion.

My current state is my brain says - nonsense and my heart says - do it. Why: even if it sounds silly, since I have children I simply want to take more responsibility myself and that also includes the sensible use of resources. Next, I am considering an off-grid solution for electricity (but that is another story).

May I ask one more question:
- could you share the individual parts of your rainwater cistern with me (e.g. type of stabilized inflow, floating intake, pump type, etc.) and can you recommend them to me because quality comes before quantity for me (if it’s cheap and good, I naturally prefer it even more).

I wish you a nice Friday and nice weather for the weekend.

Best regards, Stefan

Hello stefansteiner

I have a 10,000 liter [Zisterne] made of concrete. Of course, it had to be installed with a crane. I am absolutely satisfied. The water runs from the roof through a filter, which I have to clean every 2 years or so. Rinse well and done. I have a stabilized inflow. Withdrawal floating. The water is always clear and cool. There are no problems with algae or anything like that. They are not present. I would do it again anytime.

Steven