What is a common symptom of a faulty toilet flapper?

A common symptom of a faulty toilet flapper is continuous running water in the toilet tank. The flapper is a crucial component that seals the toilet tank and prevents water from leaking into the bowl. When the flapper is worn, misaligned, or damaged, it may not create a proper seal, leading to a situation where water continuously flows from the tank into the bowl. This issue not only wastes water but can also increase the water bill significantly.

The other symptoms listed, such as gurgling sounds, low water pressure, and an overflowing toilet bowl, could indicate different plumbing issues. Gurgling sounds might suggest problems with the venting system or blockages in the drain line. Low water pressure is typically related to plumbing blockages or faulty fixtures. An overflowing toilet bowl could be the result of a blockage in the toilet trap or the main sewer line. Each of these symptoms points to distinct plumbing concerns, whereas continuous running water is directly associated with a problem in the flapper mechanism.