When making a friction loss calculation, the driver/operator must also account for ____________ as well as ______ that may be in use with the hoseline.

The length of the hose

Appliances

Friction Loss Equation

FL = CQ²L

C = Friction loss coefficient Q = Flow rate in hundreds of gpm. (gpm/100) L = Hose length is hundreds of feet. (feet/100)

Master stream appliance friction loss.

25 psi

Appliance friction loss other than master stream devices.

10 psi

Elevation pressure loss equation.

EP = 0.5H

EP = Elevation pressure H = Height in feet

Elevation pressure loss equation for a multi-story building.

EP = (5 psi) x (number of stories - 1)

When considering pressure loss in an elevated waterway, assume a loss of __ psi for the waterway and master stream appliance.

25 psi

Pump Discharge Pressure Equation

PDP = NP + TPL

TPL = Total pressure loss in psi (friction, elevation, and appliances)

Net Pump Discharge Pressure Equation

NPDP = PDP - Intake Reading

PDP = Pump Discharge Pressure

Friction Loss Coefficients

1 - 150

1.5 - 24

1.75 with 1.5 couplings - 15.5

2.5 - 2

3 with 2.5 couplings - 0.8

5 - 0.08

Friction Loss Coefficients - Siamese Lines = length

2 - 2.5 - 0.5

3 - 2.5 - 0.22

2 - 3.5 with 2.5 couplings - 0.2

Friction Loss Coefficients - Standpipes

4” - 0.374

5” - 0.126

6” - 0.052