Red Seal Plumbing Complete 2025 Practice Exam

Question: 1 / 400

When calculating the fixture unit load of a residence a two-inch main floor drain is considered to be how many fixture units?

1 fixture unit

2 fixture units

A two-inch main floor drain is considered to be 2 fixture units when calculating the fixture unit load of a residence. This is because the Uniform Plumbing Code assigns 1 fixture unit for each inch of diameter of a main floor drain. This means that a two-inch main floor drain would equate to 2 fixture units, making option B the correct answer. Options A, C, and D are incorrect because they do not accurately reflect the fixture units assigned to a two-inch main floor drain according to the Uniform Plumbing Code. It is important to carefully read and understand all relevant codes and regulations when calculating fixture unit loads.

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3 fixture units

4 fixture units

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