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Which type of sprinkler system should be used when components are exposed to temperatures below 40 degrees F?

Wet Pipe Systems

Dry Pipe Systems

Using a dry pipe system is appropriate when components are exposed to temperatures below 40 degrees Fahrenheit due to the risk of water freezing in the pipes. Dry pipe systems are designed to store air under pressure in the pipes, which holds back the water until it is needed. When a fire is detected, the air pressure drops, causing a valve to open and allowing water to flow into the system and out through the sprinkler heads. This design prevents water from sitting in the pipes where low temperatures might cause it to freeze and potentially damage the system. Other systems, like wet pipe systems, have water permanently in the pipes, which makes them unsuitable for environments at risk of freezing. Deluge systems are typically used in high-hazard applications and require large quantities of water to be discharged simultaneously, not specifically for temperature considerations. Pre-action systems combine elements of both wet and dry systems but are more complex and generally used in areas where water damage needs to be minimized prior to activation.

Deluge Systems

Pre-Action Systems

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