Calculate pressure loss or gain due to elevation changes in fire protection piping systems
Input Parameters
Results
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Elevation Pressure Change
psi
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Outlet Pressure
psi
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Elevation Head
ft
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Application Note
Note: Elevation changes cause static pressure changes of 0.433 psi per vertical foot of water. This is a critical component in fire protection hydraulic calculations per NFPA 13 and must be accounted for in all sprinkler system designs.
Reference
Elevation Head Pressure:
P = 0.433 × SG × h
P = pressure (psi), SG = specific gravity, h = elevation (ft)
0.433 psi/ft for water (SG = 1.0)
1 psi = 2.31 ft of water head
Uphill = pressure loss, Downhill = pressure gain.