The closet bend is the fitting that turns the toilet outlet into the drain below the floor. A restriction there can affect the toilet while a nearby sink still drains normally. A blockage farther downstream can affect both fixtures.
Describe how the bowl behaves
Tell the plumber whether the bowl rises and drains slowly, whether another drain gurgles, and whether the problem returned after clearing. If wastewater is rising, stop flushing instead of testing repeatedly.
Ask what can be reached from each access point
A plumber can assess whether to begin at the fixture or use another access point. If the toilet must be lifted, ask how the flange and seal will be checked and how the fixture will be tested afterward.
Learn more about our drain cleaning service.