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Glossary
Bypass mode:
Allows water to re-circulate within pump when the gun trigger is not pulled.
chemical hose:
Feeds cleaning agents into the pump to mix with the water. Refer to
chemicals and cleaning solvents
.
chemical injection system:
Mixes cleaners or cleaning solvents with water to improve cleaning effectiveness.
choke control:
Opens and closes carburetor choke valve.
cu:
Cleaning Units. GPM multiplied by psi. (GPM x PSI = CU)
Fuel valve lever:
Opens/closes connection between fuel tank and carburetor.
GPM
: Gallons Per Minute. The unit of measure for the flow rate of water.
PsI:
Pounds per Square Inch. The unit of measure for water pressure. Also used for air pressure, hydraulic pressure, etc.
kPa (kilopascal):
Metric pressure measurement. 1 kilopascal equal 1000 pascals.
Quick-connect spray wand:
Allows the user to quickly change out high-pressure nozzles. Refer to Spray Wand Nozzles.
thermal relief valve:
When the temperature inside the pump rises too high the valve will open and release a gush of water in an effort to lower
the temperature inside the pump. The valve will then close.
Water supply:
All pressure washers must have a source of water. The minimum requirements for a water supply are 20 psi (138 kPa) and 5
gallons per minute.