When in doubt, call a plumber. A $150 service call is cheaper than replacing a pipe melted by chemicals or fixing water damage from a leak. Have you ever had a "urinal nightmare" story? Share your horror stories in the comments below!
If you have a solid yellow rock blockage that a snake won't break, buy a professional . Just remember: respect the acid. urinal unblocker
Put on rubber gloves and safety glasses. Ensure the room is ventilated. Turn off the water supply to the urinal (usually a small valve on the wall behind it). When in doubt, call a plumber