Relay Pumping

Question 1

What is “Relay Pumping”?

Answer 1

When two or more pumps are arranged in series to receive and relay a supply of water on to another pump.

Question 2

When is relay pumping typically used?

Answer 2

It is often used when the supply is distant, to overcome friction and/or head loss in the hose.

Question 3

Name four (4) factors that should be considered before relay pumping.

Answer 3

1. The quantity of the water required on the fireground.
2. The distance between the fireground and the nearest water supply.
3. The number and capacities of available pumps.
4. The terrain over which the relay extends.

Question 4

Name the two (2) types of relay pumping.

Answer 4

1. Open circuit.
2. Closed circuit.

Question 5

Describe open circuit relay pumping.

Answer 5

The initial pump delivers water to a holding dam or appliance tank, rather than a collector.

Question 6

Describe closed circuit relay pumping.

Answer 6

The “base” pump delivers water to a “booster” pump(s) who then delivers water to the “fireground” pump.

Question 7

What is the maximum number is hose lengths between the base pump and the first booster pump?

Answer 7

Should not exceed 5 lengths.

Question 8

What is the maximum number of hose lengths between the booster pump and the fireground pump?

Answer 8

Should not exceed 7 lengths.

Question 9

True or False; Firefighters should use twin hose lines between the base pump and the relay pumps?

Answer 9

True.