Red Seal Plumbing Practice Exam 2026 – Comprehensive All-In-One Guide for Exam Success!

Question: 1 / 400

After the inspection of a hot water heating system shows that the system pressure is in excess of the designed operating pressure, which device will cause this problem?

Pressure relief valve

Water-feed valve

A Pressure relief valve is used to relieve high pressure in a system, not cause it.

C: Thermostat is used to control the temperature, not the pressure.

D: Expansion tank helps maintain constant system pressure, not cause it.

The only device that can cause high pressure in a hot water heating system is the water-feed valve. This valve controls the water supply to the system and if it is malfunctioning, it can allow too much water into the system, causing the pressure to exceed its designed limit.

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Thermostat

Expansion tank

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