A common release characteristic of Deluge and Pre-Action systems (regardless of release method) is

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Multiple Choice

A common release characteristic of Deluge and Pre-Action systems (regardless of release method) is

Explanation:
In these systems, water is kept out of the piping until a deliberate release action happens. The path for water into the system is opened only when a release command is issued, rather than water flowing freely by itself. In practice, this releasing action is most commonly a manual release of the valve, even though some installations may use automatic or electrical triggers to initiate that release. The key point is that you must perform a release to admit water into the system, which is the shared characteristic of Deluge and Pre-Action setups.

In these systems, water is kept out of the piping until a deliberate release action happens. The path for water into the system is opened only when a release command is issued, rather than water flowing freely by itself. In practice, this releasing action is most commonly a manual release of the valve, even though some installations may use automatic or electrical triggers to initiate that release. The key point is that you must perform a release to admit water into the system, which is the shared characteristic of Deluge and Pre-Action setups.

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