ᐅ Freshwater Supply and Rainwater Storage Tank for the Garden

Hello,
currently I only have cistern water in the garden. If the weather turns out like last year, this will certainly not be enough.
The domestic water system is located in the basement (boiler room). From there, a pipe runs to the terrace.
I am aware that cistern water and the fresh water supply must not be connected.

Would it be acceptable to have a hose section that allows switching from the cistern water line to the fresh water line? This way, no direct connection would exist between the two lines. That would be the simplest solution. Or is that completely unreasonable?
Best regards,
Rudi

Good morning,
That should not be a problem, as the main concern is to prevent any cistern water from entering the potable water system.

Best regards,
Birgit