Rhode Island Journeyman Plumber Practice Exam

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Study for the Rhode Island Journeyman Plumber Exam. Prepare with flashcards and multiple choice questions, each with hints and explanations. Achieve success in your plumbing career!

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What is the minimum and maximum length of a waste stack to a trap weir?

18" to 30"
24" to 36"
36" to 48"
A pressure reducing backflow preventer

The correct answer is: A pressure reducing backflow preventer

The concept of a waste stack length related to a trap weir focuses on the proper functioning of drainage systems. A waste stack must maintain specific lengths to ensure that waste flows effectively to prevent clogs and ensure proper drainage. The proper minimum and maximum length of a waste stack to a trap weir typically falls within established plumbing codes. An appropriate range is 18" to 30", which ensures adequate ventilation and prevents issues related to trap siphoning. The mention of a pressure reducing backflow preventer in this context does not pertain to the lengths of waste stacks. Instead, it refers to a device used for maintaining water pressure and preventing contaminated water from entering the potable supply. Understanding the actual function and application of plumbing components ensures proper installation and compliance with plumbing codes. In summary, recognizing the correct minimum and maximum lengths for a waste stack in relation to a trap weir is essential for ensuring efficient drainage and adherence to plumbing standards.