Massachusetts Plumbers Journeyman Practice Exam

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Prepare for the Massachusetts Plumbers Journeyman Exam. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Ensure your success!

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What minimum water seal must floor/trough drains provide?

Two inches
Three inches
Four inches
Five inches

The correct answer is: Two inches

The minimum water seal that floor and trough drains must provide is two inches. This water seal acts as a barrier, preventing sewer gases from entering the living space. The two-inch water seal is a standard requirement in plumbing codes, ensuring adequate protection against odors and harmful gases that could be emitted from the drainage system. Using a water seal of less than two inches could increase the risk of sewer gas escaping into the occupied areas, which could pose health hazards. Therefore, the two-inch requirement is crucial for maintaining a safe and sanitary environment in buildings where floor and trough drains are installed.