After snaking a toilet drain, the client reports that the toilet flushes slowly and gurgles, even though the snake seemed to clear an obstruction. What is the most likely next step to diagnose the persistent issue?

Question: After snaking a toilet drain, the client reports that the toilet flushes slowly and gurgles, even though the snake seemed to clear an obstruction. What is the most likely next step to diagnose the persistent issue?

Answer options:

• Recommend replacing the toilet
• Use a stronger chemical drain cleaner ✅ Inspect the vent pipe for obstructions
• Advise the client to use less toilet paper

Correct answer: Inspect the vent pipe for obstructions

Explanation: Gurgling and slow drainage after snaking often indicate a partially or fully blocked vent pipe, which prevents proper air equalization in the drainage system. Replacing the toilet or using chemical cleaners won't address a vent issue, and advising less toilet paper doesn't solve the underlying problem.