Foam ops
Foam eductor setup drill
A foam eductor drill that reinforces correct inlet pressure, hose before the eductor, hose after the eductor, nozzle compatibility, and foam concentrate use.
Drill plan
ObjectiveCorrect the common mistake of calculating foam eductor PDP below the required eductor inlet pressure.
Setup
- 50 feet of hose from engine to eductor
- Eductor requires 200 PSI at inlet
- 150 feet of hose after eductor to the nozzle
- Nozzle must match eductor flow rating
Student taskStudents explain what the pump must supply and why the hose/nozzle after the eductor still matters.
Expected answer pathPDP must provide the required eductor inlet pressure plus friction loss in the hose before the eductor. The hose/nozzle after the eductor must be compatible with the eductor and manufacturer limits.
Common mistakes
- Forgetting to state nozzle pressure or required appliance/device pressure.
- Using GPM where PSI is needed, or PSI where GPM is needed.
- Adding elevation or appliance loss twice.
- Ignoring department SOPs, apparatus pump chart, or manufacturer data.
Instructor note: After the first answer, change one variable and repeat the calculation.
Print notes
This page is designed to print as a simple station drill handout. Use it with the calculator/tool link above to check student answers live.