NFPA 14 Class I Manual Combined Standpipe

[dumor]

Per 2010 NFPA 14, 7.10.1.2.2 I'm providing 250 Hose allowance at all three (3) 2-1/2" Hose Connections of a Class 1 Standpipe System.
per 7.8.1, I'm providing 100psi at the most hydraulically remote single 2-1/2" connection.
The System is Manual and Combined with two separate Wet pipe Sprinkler Systems.

 

[JWeak]

The minimum requirement of NFPA 14 for a single standpipe riser shall be 500 gpm at a minimum residual pressure of 100 psi (maximum of 175 psi), so if you have 2 riser it should be at 750 gpm capacity and again the remotest shall be 100 psi minimum. If you calculate this set the "remotest" at 100 psi and you will found out that the pressure required from the other 2 1/2 in hose connection would be lesser compared to the remtoest Hose Connection.