ᐅ Make the water line from the rainwater cistern frost-proof

I have a cistern with a pump that I used to water my garden during the summer. Since there wasn’t enough time in spring before moving in (and also because the final position of the outlet wasn’t decided yet), I simply connected a garden hose to the pump, which now runs above ground to the outlet (spigot). Here is a sketch:

My question: How can I make this frost-proof? My idea was to install some kind of valve at the blue circle, which I would open in winter to drain all the water from the hose back into the cistern. The pump would of course be turned off (I don’t need water in winter).

Are there better solutions for this setup? How have you dealt with similar situations? I’d prefer not to completely remove the pump every winter unless it significantly extends the pump’s lifespan.

I take out the pump, disconnect the hose, and the issue is resolved. Just 5 minutes of effort once a year.

Should we stick with the hose?

I would connect and bury a PE-HD pressure pipe (12.5 bar) similar to a proper irrigation system.

Install a T-piece with a valve inside the cistern. In autumn, open the valve and blow through it from the other side with compressed air. Gravity alone is usually sufficient.

If you prefer to stick with the hose, add a connector inside the cistern. Detach the hose, let it drain or blow it out, and store the hose until spring.

That's why I asked... I would work directly with pipes and maybe set up 2-3 tap points. Very practical.

I would do it like this.

Lay the pipe with a slope toward the cistern.
This way, you don’t need to use a compressor or anything else.

Where the blue circle is marked, install a T-piece with a valve. It’s best if this points downward.