NMFIRE NFPA20 - 3.9 Fire Pump Controller Pressure Sensing Line

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FIGURE A.3.9（B）Pressure Sensing Line
1. Check valve on pressure sensing
line, disc drill 2.4mm through hole;
2. Check valves are installed in the
opposite direction of flow;
3. Installation distance of two check
valves ≥1.5m.
Test Valve
Test
Valve
Check Valve
Globe Valve
FM/UL fire pump
controller
Drainage Ditch
From fire
water tank