Let's take a top down look at how to Relay Pump from a Draft. 

No two scenarios are the same, so as a skilled operator, you may have to think outside of the box when drafting. 

There are 3 main components that we will cover on Monday/Tuesday

4-5 People Per Group and approx 30 minutes on each topic 

1. Drafting

2. Pumping/Relay

3. Handline & Ground Monitors 

• Position vehicle so your able to REACH / CONNECT TO YOUR WATER SOURCE

• Vehicle must be completely stopped & air brake applied (non pump-n-roll)

• Engage drive between pump and truck (eg. left green light in image)

• Engage pump its self (eg. right green light in image) 

• Once both green lights are lit in this example, your pump is running. 

• You may see your Speedometer come ALIVE as it thinks your truck is moving but it is powering the pump now, not the wheels

• Wheels Chocked

• Vehicle Positioned properly

• Class 2 Safety Vest / PFD

• Signage, Pylon's, Lighting? 

• Always 3 Points of Contact 

• Connect proper strainer to hard suction, ensure all connections are tight. (drafting and air don't mix) 

• Connect Hard Suction to Master Intake Port on Truck 

• Increase Engine RPM to between 1000 - 1200 

• PULL PRIME & OPEN INTAKE VALVE - No Longer than 30 seconds at a time  

• Establish Vacuum (Compound / Intake Gauge), watch water come up your hard suction 

• Verify water flow by opening Tank Fill / Recirculate

• Fill Porta Tanks, On Board Tanks and/or Standby to supply water to the attack pumper (relay) 

• Open Tank to Pump

• Communicate and Open Attack LIne for Suppression

• In RPM MODE, 

  • Set first lines pressure using calculations from OFC Pump Chart

  • Establish good smooth flow

• Switch Pump to PRESSURE MODE

  • Communicate and Open 2nd Attack Line for Suppression 

  • Establish good smooth flow, your engine RPM will increase as needed for second attack like

• Check all line pressures, your pump and govenger should be set to highest attack line pressure and then you should 'throttle' back any lines that require less pressure.

• Ask your supply tanker to 'Give you water'

• This should come at their IDLE pump pressure, usually around 350-500 kpa. 

• Once your LDH (High-Vol 100MM) is charged, bleed the air and open the supply.

• This pressure should reduce the efforts of the engine and reduce rpm (centrifugal pump utilizes incoming pressure)

• Watch your Compound Gauge / Vacuum Gauge that your residual pressure does not drop below 200 kpa. 

• When you need water, ask supply for it...

  • Supply up 200 Kpa

  • Supply Up 500 Kpa

• This is all based off your OFC Pump calculations for the additional suppression lines you are supplying