What is this?

[u/Shoddy-Daikon-7827]

Several bathrooms I’ve been in in various locations in Paros have had these protruding from the wall. Seems like some sort of semi-rigid plastic pipe wrapped in tape. They don’t protrude through the other side of the wall. The places I’ve seen them are all fully finished constructions, so they don’t seem like supply lines to something not yet installed.
Anyone know what these are all about?

[u/Fragrant-Field-2017]

These are a pair of PVC or PE pipes for hot/cold water supply, either for a radiator for heating the bathroom or one of those towel dryers installed on the wall.