Posso usare questo prodotto per questo tipo di doccia? (Sono preoccupato che il materiale all’interno dei tubi della doccia sia in plastica e il prodotto sia troppo abrasivo).

I did it once before and it worked well and pumping is still good months later. Am not a plumber though

If it helps: there are only a few kind of acids that can break down plastic. You should be fine in using it but please read the instructions and follow them carefully

I would suggest you don’t use it. Inform your landlord that the pipe is clogged. The blockade could well be in the main pipeor further along your branch pipe, then a professional pipe cleaner would have to come. The chemical cleaner will just sit in the P-Trap and will do something between “nothing” and “making lots of foam and funny noises” but no working results.