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Flashcards in Pumping Formulas Deck (11):
1

Engine Pressure Formula

EP= NP+FL+Appliance +or- Back Pressure

2

Nozzle reaction formula

1.5 x D2 x pressure

3

Momentary nozzle reaction

1.8 x D2 x pressure

4

Nozzle reaction of fog nozzle

1/2 gpm

5

GPM discharge formula

29.7 x D2 x square root of the pressure

6

GPM discharge formula field calculations

30 x D2 x square root of the pressure

7

From hydrant or open butt

30 x D2 x square root of the pressure x .9

8

Friction Loss formula >100 gpm

2Q2 +Q

9

Friction Loss Formula <100 gpm

2Q2 + 1/2Q

10

Back pressure formula

Psi per foot - .434 x height in feet

11

Fire ground- back pressure

Psi per foot – ½ psi
Psi per floor – 5 starting at floor above first floor