In plumbing, what does a trap seal help prevent?

A trap seal is specifically designed to prevent the leakage of gases from the drainage system into the living spaces of a building. This is crucial in maintaining indoor air quality and safety, as it effectively acts as a barrier against harmful sewer gases, which can be unpleasant and hazardous.

The trap consists of a U-shaped bend filled with water, creating a seal that blocks gas from escaping while still allowing wastewater to flow through. The water in the trap must be maintained to ensure that the seal remains effective; otherwise, if the water evaporates, it can result in the gases escaping into the home.

Understanding the role of a trap seal in plumbing systems is essential for ensuring that plumbing installations not only function properly but also safeguard health and comfort.