Hello everybody, I appreciate if you answer my question,Is it necessary or optional to have a drain valve for water sprinklers of a warehouse?????
Thanks in advance for sharing your knowledge.
Sprinkler systems are required to have drainage in such way that the entire system can be drained. Usually the main drain valve at the riser is sufficient, but when part of the system cannot be drained by the main drain, then auxiliary drain valves must be installed.
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