Page 30 - FF Aid BETA_Neat

Closed Relay Key Points:

• Park to protect the pump operator
and give other vehicles access
• Use the largest output pump as the
base pump
• Use the biggest diameter hoses and
twin feeders between pumps
• Set the relief valves
• Establish communications between
the pump operators
• Allow air to escape between the
pumps
• Raise and lower the pressure in a
controlled way
• Always shut down from the base
pump
• Ensure the inlet pressure on the
compound gauge stays above 100
kPa. This includes a base pump
working from a hydrant supply.

PUMP RELAYS