What the other two said, keep it PG-13. Some advice on this is to avoid cliches, gore, body mutilations, sexual assault, it. can all be very redundant when it comes to writing.

Often times the best way to portray torture without being cliche or overdoing it, is to not exaggerate the situation happening. 

"Her head sunk deep into the pot of water. She kicked and gasped for breath after her torturers pulled her out of the shit filled toilet."

See? No exaggeration, no explanation of the pain or feelings, just a simple statement of what is happening.