Massachusetts Plumbers Journeyman Practice Exam 2025 - Free Plumber Journeyman Practice Questions and Study Guide

Question: 1 / 400

What is the maximum diameter that the opening of strainer plates on drain inlets should be designed and installed at?

1/4"

1/2"

The maximum diameter for the opening of strainer plates on drain inlets is specifically designed to prevent larger debris from entering the drainage system while allowing adequate flow and drainage. A size of 1/2 inch strikes a balance between effective drainage and proper filtration, as it is large enough to allow water to flow freely without being obstructed by smaller debris, yet small enough to prevent the passage of larger objects that could lead to clogs.

Choosing a diameter larger than 1/2 inch could potentially allow unwanted materials to pass through, leading to blockages down the line and necessitating maintenance or repair. Thus, the 1/2 inch specification is established to ensure optimal performance and longevity of the plumbing system, making this option the correct choice.

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3/4"

1"

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