RELAY PUMPINGRELAY PUMPING

Task Force-7Task Force-7

Engine 14Engine 14

Engine 13Engine 13

Batt. 2Batt. 2

Dual PumpingDual Pumping In a dual pumping operation, two pumpers In a dual pumping operation, two pumpers

are connected intake to intake in order to are connected intake to intake in order to take advantage of an excellent water source.take advantage of an excellent water source.

Tandem PumpingTandem Pumping In tandem pumping, the engine In tandem pumping, the engine

connected to the supply source connected to the supply source discharges water into the intake of the discharges water into the intake of the second engine. second engine.

I. Definition:I. Definition:

The process of using two or more The process of using two or more pumpers to move water through pumpers to move water through hoselines over a long distance by hoselines over a long distance by operating the pumpers in series.operating the pumpers in series.

A. Constant PressureA. Constant Pressure {Equal Distance {Equal Distance Method}Method}

Constant PressureConstant Pressure

1. Each pumper lays same amount1. Each pumper lays same amount 2. 1000 ft. is common distance2. 1000 ft. is common distance 3. 175 psi E.P.3. 175 psi E.P. 4. Attack pumper - constant flow4. Attack pumper - constant flow 5. Attack pumper - dump line5. Attack pumper - dump line

B. AdvantagesB. Advantages

B. AdvantagesB. Advantages

1. No guess work in placement1. No guess work in placement 2. Minimal calculations 2. Minimal calculations

{hydraulics}{hydraulics} 3. Fewer pumpers needed3. Fewer pumpers needed

C. Relay Operating C. Relay Operating ProceduresProcedures

C. Relay Operating C. Relay Operating ProceduresProcedures

{Source & Relay {Source & Relay Pumpers}Pumpers} 1. Source pumper gets water1. Source pumper gets water

2. Relay pumper prepares for water2. Relay pumper prepares for water 3. Source pumper opens discharge3. Source pumper opens discharge 4. Relay pumper engages pump4. Relay pumper engages pump 5. Relay advances throttle to 175 psi5. Relay advances throttle to 175 psi 6. All relays maintain 20 -50 psi residual6. All relays maintain 20 -50 psi residual 7. Each pumper duplicates these steps7. Each pumper duplicates these steps

D. Relay Operating D. Relay Operating ProceduresProcedures

{Attack Engine}{Attack Engine}

D. Relay Operating D. Relay Operating ProceduresProcedures

{Attack Engine}{Attack Engine} 1. Establish discharge pressure 1. Establish discharge pressure

[N.P.][N.P.] 2. All pumpers then set relief 2. All pumpers then set relief

valvesvalves 3. Cavatation prevention3. Cavatation prevention

E. Shutdown ProceduresE. Shutdown Procedures

1. Attack engine shuts down first1. Attack engine shuts down first 2. Shutdown in reverse procedure2. Shutdown in reverse procedure 3. Water is allowed to discharge 3. Water is allowed to discharge

through dump linethrough dump line 4. Each pumper in line follows 4. Each pumper in line follows

reverse shutdown procedurereverse shutdown procedure

F. CommunicationsF. Communications

F. CommunicationsF. Communications

Like all other fireground Like all other fireground operations, good communications operations, good communications are vital to relay pumping.are vital to relay pumping.

F. CommunicationsF. Communications

Separate radio channel early on.Separate radio channel early on. I.C. / OperationsI.C. / Operations Needs to be modified to suit A.F.D.Needs to be modified to suit A.F.D.

F. CommunicationsF. Communications

Separate radio channel early on.Separate radio channel early on. I.C. / OperationsI.C. / Operations Needs to be modified to suit A.F.D.Needs to be modified to suit A.F.D. S.O.P.’s ? ? ?S.O.P.’s ? ? ?