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Sprinklers regulations

Question asked by jlandin on Sep 24, 2019
Latest reply on Sep 26, 2019 by milt.werner
We found some doubtful quality welding in different points of the system and we require your support to determine if NFPA standards allow this type of installation.
 
Also the pipe itself doesn't look like approved fire piping (black steel pipe or galvanized), any comments will be highly appreciated.
Please see the attached images.

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