My contractor asked me to buy a 'p 'trap closet .I bought the same .now he says he wants "s"trap .bathroom tiles are fixed.the closet is extended wall mounting called crystal of hindware an indian company.my question is what should be done now to convert 'p' to 's' and how to fix the same without breaking the tiles

You posted on 4 1/2 year old post...

Is your toilet installed on the wall ? Like Geberit wall hung toilet ? Or is it conventional toilet that seats on the floor ? Are you on slab or raised foundation ?

I suspect you and your GC have to synchronize your terminology. Conventional toilets are all built the same, with same type of trap. I never heard anybody referring to toilet bowl as having "P" or "S" trap.

But if I looked at a conventional toilet, the built-in trap looks like "S" trap.

Wall Hung and Conventional floor toilets - have two completely different rough-ins. It is huge mess to switch it over from one to another. I cannot imagine doing it after tile is installed...

Milos correct. A regular toilet has a internal "S" trap while a wall hung toilet has a internal "P" trap. If your contractor roughed you in for a wall hung toilet why in the world is he asking you to convert to a regular toilet and why wasn't a regular toilet roughed in the first place? Regards, Tom