Massachusetts Plumbers Journeyman Practice Exam 2025 - Free Plumber Journeyman Practice Questions and Study Guide

Installing all floor drains and trough drains with an automatic trap-priming device is essential for maintaining proper drainage function. This device ensures that the trap remains filled with water, creating a seal that prevents sewer gases from entering the building. A trap that is properly maintained with water discourages odors and provides an essential barrier against harmful fumes, which is crucial for occupant safety.

Additionally, a trap-priming device effectively maintains the water level in the trap without requiring manual intervention. This enhances the reliability of the drainage system and reduces the risk of trap drying out, which can occur over time, particularly in infrequently used drains. This level of system design adheres to plumbing codes, which emphasize safety and sanitation standards in building systems.

Overall, the use of an automatic trap-priming device represents best practices in plumbing for floor and trough drains, addressing both functionality and compliance with health and safety regulations.