Water supply
Hydrant Supply to Attack Line Drill
Establish a hydrant supply, transition from tank water, and maintain the attack-line pressure. This is an original FireOps Calc drill organizer for NFPA 1410-style training and department-level practice.
Use local standards: Set staffing, time benchmark, PPE, water flow, hose load, and pass/fail criteria from your department SOP and official NFPA documents. This page does not reproduce the official NFPA standard.
Objective
Practice the engineer’s transition from tank water to a sustained hydrant supply while keeping the attack line stable.
Setup
- Engine at simulated fire building
- Hydrant or marked hydrant prop
- LDH or supply line
- One attack line flowing
- Hydrant firefighter or second member assigned
Evolution flow
Attack line begins from tank water.
Supply firefighter secures hydrant and connects LDH.
Engineer prepares intake and communicates before switching supply.
Hydrant is opened and intake pressure is confirmed.
Engineer maintains target PDP and checks for pressure drop.
Crew discusses available flow and whether a second line is appropriate.
Engineer focus
- Tank-to-pump and intake valve awareness
- Residual/intake pressure monitoring
- Smooth transition to hydrant water
- Second-line water supply decision
- Hydrant and LDH safety
Common mistakes
- Not confirming intake pressure
- Closing tank water too early where SOP requires otherwise
- Ignoring residual pressure after adding flow
- Failing to communicate when water source changes
Evaluator sheet
Score and debrief
Use this as a printable quick score sheet. Add department-specific time targets and safety requirements before the drill.
Evaluation item
Result
Notes
Water established
Yes / Needs work
Line/device deployed safely
Yes / Needs work
Target pressure selected correctly
Yes / Needs work
Communication clear
Yes / Needs work
Kinks/hazards corrected
Yes / Needs work
Debrief completed
Yes / Needs work
After-action questions
- What was the first delay in the evolution?
- Was water available before the crew needed sustained flow?
- Was the pump pressure chosen from a known source or guessed?
- What did the engineer have to correct during the drill?
- What will the crew do differently on the next repetition?