SOP 411 Water Supply for Relay Ops Flashcards
1
Q
When is relay operations used?
A
Whenever the closest available water supply is inadequate, nearest water supply is an extended distance or an increased elevation from the incident
2
Q
What modes should the engines be operated in for relay pumping?
A
Waterous pumps operate in volume. PUC pumps operate in RPM mode
3
Q
Where is the largest capacity pumper placed?
A
At the water source
4
Q
How do relay operations start?
A
Start at the source pumper water moves towards attack pumper and done in reverse when shutting down.
5
Q
What is the intent of the relay?
A
To balance all the pressures and engine speeds with the attack pumper controlling the relay
6
Q
Maximum discharge pressure of any pumper shall not exceed
A
185 psi
7
Q
Minimum residual pressure should be
A
20 psi
