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Sprinkler system and standpipe

Question asked by alirezazamani on Jun 24, 2020

We have a main public firefighting pipe in the site (Yard) that fed by fire pumps and fire hydrants are mounted on this pipe.

The (residential) buildings in the site are equipped with sprinkler and class III standpipe protection systems.

the sprinkler system inlet pipe for each building shall be equipped control and alarm valve due to NFPA 13 requirements.

So I think that is required to take a branch pipe from main (public firefighting) pipe in the site for each building and this branch pipe should be connected to a header therefore two separate pipe could be taken from header for sprinkler and standpipe systems.
has this design been done in accordance with the NFPA Requirements?