What is the minimum water seal depth for traps?

The minimum water seal depth for traps is correctly identified as 2 inches. This measurement is crucial for ensuring effective functioning of plumbing traps, which are designed to prevent sewer gases from entering living spaces. The water in the trap creates a seal, blocking these gases, while also allowing wastewater to flow freely.

A 2-inch water seal is typically adequate to provide the necessary barrier against foul odors and potential health hazards associated with sewer gas. Traps with a seal depth less than this may not effectively prevent gas from escaping, especially under certain conditions, such as changes in pressure within the plumbing system or when water levels in the trap fluctuate.

Understanding the significance of maintaining this minimum seal depth is vital for proper plumbing installation and maintenance, contributing to the overall safety and functionality of a home's plumbing system.