In single-loop systems, the ____ prevents hot water in the boiler from slowly circulating through the distribution system when the circulator is off.

Question

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A flow-check valve is designed to prevent hot water from circulating back into the boiler when the circulator is off. This ensures that hot water is available immediately when the circulator turns on, rather than having to wait for the hot water to circulate through the entire system. A diaphragm is not specifically designed for this purpose and an off switch is a control device, not a component. Thermosiphon is a natural circulation system and is not used in forced-circulation systems.

In Single-Loop Systems, the ____ Prevents Hot Water in the Boiler