Red Seal Plumbing Practice Exam 2025 - Free Red Seal Plumbing Practice Questions and Study Guide

Question: 1 / 400

When water pressure exceeds ____ kPag a pressure-reducing valve should be installed.

400

550

When water pressure exceeds 550 kPag, a pressure-reducing valve should be installed. This is because water pressure that is too high can damage pipes, fixtures, and appliances, and can also cause excessive water use and higher utility bills. Options A, C, and D exceed recommended water pressure levels and would require a pressure-reducing valve to be installed. Option A (400 kPag) may also cause low water flow and inadequate pressure in the home, while option D (850 kPag) could potentially cause pipe bursts or leaks. Therefore, option B (550 kPag) is the most appropriate threshold for installing a pressure-reducing valve.

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700

850

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