Recommendations for a garden pump to empty a shaft

talk to the civil engineer who created the shaft and overflow, ask him what his plan is with it. Probably everything is fine and you can pump garden water from there. Also talk to the neighbors about water, basements, and their experiences, do you have basements?

We have a basement. Also designed to withstand occasional pressing water. All the neighbors around also had water during the earthworks. But none as much as we did. Yes, according to the earthworks contractor, the water is diverted from the spring into the shaft, so that we can draw garden water from there.

and where does the overflow go?

So, today I ran the pump for three hours first. The water level in the shaft only dropped slightly after 2.5 hours. From then on, when the water next door in the pit had disappeared. This should indicate that the pipes to the shaft were laid correctly.

That is good for now, ask the [Tiefbauer] how he envisioned the shaft and the overflow. It may be that you lower the layer or groundwater over a larger area. Is the basement slab lower than the water level in the shaft?

Does your pumping action work regularly?