The pump will still boost its inlet pressure. If you use the FDC to boost the 
inlet pressure to 175, then the pump will discharge 175 + pump pressure. Could 
be too much.

Matt

From: Sprinklerforum [mailto:[email protected]] On 
Behalf Of Jamie Seidl
Sent: Wednesday, January 31, 2018 3:30 PM
To: [email protected]
Subject: FDC & Pump

I have always installed FDC's on the discharge side of fire pumps.  Looking 
through 2013 NFPA 20, I don't see anything precluding the instillation on the 
supply side.  Is the FDC allowed to be installed on the supply?
I have a contractor that has installed the FDC on the supply run-in, instead of 
stubing up a secondary line from the remote FDC.
Thanks,
Jamie
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