Water pipeline without entry in the land register

Hello, since we recently had a pipe break and have observed settlements in the house, we are now worried about the fresh water pipe of our neighbor. When it was built back then, it was kept secret from us that the water pipe runs through our field/property, when the excavator driver noticed the pipe, everything was done to keep it there and to "dig around it" at their own expense. This water pipe is also not registered in the land register. The house is located in Bavaria. We have had problems with these people from the beginning, who repeatedly violate the border rights and devalue our property. We wanted a good relationship with our neighbors back then and have accepted and tolerated quite a bit. If the water pipe should be damaged now, who would be responsible for the damages? We know about the settlements and also about our sewage pipe, which is either responsible for this or was also damaged by the settlements. What do we need to pay attention to? Thank you very much in advance. Best regards Inge

When were the water pipes laid?

1993

this water pipe

Who owns the pipe? The neighbor or your network operator?

when the excavator driver noticed the pipe, everything was done so that it would remain there and at his own expense

Sure. If it turns out that he excavated without a pipe inquiry, the costs for him will quickly be higher than if he had dug around it.

If the water pipe should now be damaged

In very few cases do underground water pipes get damaged without external events. "By itself," almost nothing breaks, especially not with that year of construction. If it does: pipe owner/operator.
In case of damage caused by external influences (excavator strike, etc.), the owner/operator will always hold the cause of the event responsible.

This water pipe is also not registered in the land register.

Under certain conditions, it does not have to be registered because it must be tolerated. Paragraph 8 AVBWasserV.

As far as I know, you could have demanded a relocation from the network operator before you started construction. This would fall under the point of unreasonableness. The network operator would then have relocated it at their own expense during your excavation or beforehand. However, this only works if there is no easement from the network operator and they also own the line.

I only know how it is in Ba-Wü. There, the pipe up to the water meter belongs to the municipality / city. The municipality bears all the costs, which are then distributed among everyone through the water price. If a culprit for the damage can be identified, then that person or their liability insurance is responsible.