Where is an S trap most likely to be found?

An S trap is most likely to be found under a kitchen sink. This type of plumbing trap is designed to prevent sewer gases from entering the home while allowing wastewater to flow through. The S shape of the trap holds a small amount of water at the bottom, creating a seal that blocks odors.

Under a kitchen sink, it's common to have various plumbing fixtures that require venting and trapping to ensure proper drainage and ventilation. Other locations, such as bathtub drains or main drain lines, typically utilize different types of traps, such as P traps, which are more common and efficient for those specific applications. An outdoor hose bib does not use traps at all, as it is designed to drain freely to prevent freezing and backflow.