Why is it important to have trap primers in a plumbing system?

The importance of trap primers in a plumbing system is fundamentally tied to their role in maintaining the water seal within traps, particularly those that are infrequently used. Traps are designed to hold a small amount of water, creating a barrier that prevents sewer gases from entering the living space. Over time, especially in fixtures that aren’t used regularly, this water can evaporate, which compromises the trap’s ability to perform its function effectively.

A trap primer introduces water into the trap automatically when it detects that the water seal has dropped below a certain level. This mechanism ensures that the trap is always able to hold enough water to block any gases, preserving indoor air quality and safety. Without trap primers, these frequently unused fixtures could allow harmful sewer gases to enter the home, which is a health hazard.

Understanding this necessity is crucial for maintaining a properly functioning plumbing system and ensuring the safety and comfort of residents.