Nozzle Reaction Force

Calculate nozzle reaction force for firefighter safety.

Smooth bore: 50 PSI handline, 80 PSI master. Fog: 75-100 PSI typical.

Nozzle Reaction Guidelines

Force (lbs) Category Staffing
<60 lbsSingle Firefighter1 person
60-75 lbsManageable1-2 persons
75-100 lbsChallenging2 persons
100-150 lbsDifficult2-3 persons
>150 lbsMaster StreamFixed device

Formula:

Smooth Bore: NR = 1.57 x d² x NP
Fog Nozzle: NR = 0.0505 x Q x √NP