Replace sink with pre-wall element

Addendum: Walraven BIS RapidRail WM2 sliding nut M10

Thank you very much for your hints!

Why landlord problem? The landlord provided an apartment including a sink. The appearance does not matter, it worked. The tenant wants a different one. The tenant has to hand over the apartment at the end of the rental period as it was accepted. So it's the tenant's responsibility. From start to finish. I would get a plumber. If tiles are damaged, there will be problems.

The plumber is coming next week, I will get in touch again and report what came out of it. Unfortunately, I can only find the Walraven BIS RapidRail WM2 sliding nut M10 in wholesale, not for private buyers.

Ebay has them, but with high shipping costs. Alternatively, probably any other standard sliding nut for 30 cents would work. Or you call around the usual plumbing supply stores.

Anyway, I'm already looking forward to the report on how the installer manages to solve it :)

Keep your fingers crossed that I have a solution to report ...