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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How close to the trap weir should no vent be installed?

  1. Two pipe diameters

  2. Three pipe diameters

  3. Four pipe diameters

  4. Five pipe diameters

The correct answer is: Two pipe diameters

A vent should not be installed closer than two pipe diameters to the trap weir to prevent any interference with the proper functioning of the trap. Installing the vent too close to the trap could potentially disrupt the water seal in the trap, leading to sewer gas escaping into the building. Therefore, maintaining a distance of at least two pipe diameters ensures that the vent functions effectively without causing any issues with the trap.