What is a common sign of a clogged drain?

A common sign of a clogged drain is slow drainage. When a drain becomes clogged, the flow of water is impeded, causing it to take longer than usual to move down the pipe. This occurs because the obstruction prevents water from flowing freely, leading to a buildup that reduces the effective diameter of the pipe. Homeowners may notice that sinks, tubs, or showers take longer to empty than they should, which is often the first indication of a clog needing attention.

Other options do not directly relate to the typical indicators of a clogged drain. Warm water flow is unrelated to drain issues; it refers to the temperature of the water, which typically does not change due to a clog. No water usage indicates that the plumbing system is inactive but does not signal a clogged drain. Freezing pipes, while a serious issue that can cause drainage problems, is not a common sign of a simple clog.