Red Seal Plumbing Complete 2026 Practice Exam

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What device can be installed to protect a hot water boiler from low water level?

Probe type cut off

Installing a probe type cut off is the most effective way to protect a hot water boiler from low water level. A diaphragm tank would be used for pressure regulation, not water level protection. A flow switch monitors the flow rate, not the water level. And a pressure reducing valve is used to regulate water pressure, not to protect against low water level.

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Diaphragm tank

Flow switch

Pressure reducing valve

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