New to house ownership here in Switzerland and what would be a basic question elsewhere, to me, seems slightly more complicated here. Have a basic 'pole attached to wall' where the showerhead hangs and I wanted to put up something akin to a 'rainshower head'.
Is an 'All Rounder' required or a Plumber? Or is it just a matter of calling the Hauswart?
Honestly, this is a DIY job! You just screw the old shower head off and screw the new one on. Extremely simple. The new shower head probably comes with a silicone washer; if so, replace the old washer, too. Just put the new one where the old one was.
Or I'll do it for you, for CHF 150 plus tax plus car usage fee.
OP probably means a "Kopf"- or "Deckenbrause". There could be a bit more to the installation, depending on it's age. Still doable by yourself though probably. A picture would help?
If you get one to screw on, beware of just importing one, English threads are different.
Depends on what you want. If it's just a new shower head, then DIY is the way to go. If you need to change the plumbing for an overhead rain shower thing, then it's the plumber, after you have permission from the landlord. If you're renting, that is.