Massachusetts Plumbers Journeyman Practice Exam

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Study for the Massachusetts Plumbers Journeyman Exam. Prepare with multiple choice questions, hints, and detailed explanations. Ace your licensing exam with confidence!

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

Two pipe diameters
Three pipe diameters
Four pipe diameters
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.