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GLOSSARY OF TERMS
PSI – Pounds per square inch. Pressure washers are designed and rated to operate
at a specific PSI. Operating at pressures exceeding the maximum rating could
result in damage to the unit and/or SEVERE PERSONAL INJURY.
GPM – Gallons per minute. The orifice on the pressure wand assembly has been
selected to deliver up to the maximum GPM for your machine.
PRESSURE WAND ASSEMBLY – This refers to the gun, wand, and nozzle.
PUMP – The pump moves the water through the system and delivers it to the
pressure wand assembly.
OIL, PUMP –The oil used within the pump to lubricate its operation. Important to
use only SAE 30 Wt Non Detergent
OIL, GASOLINE ENGINE – Machines which are powered by gasoline engines
need appropriate lubricant. Use 10W30 detergent oil.
UNLOADER VALVE – Is a valve located at the head of the pump for unloading
water back into the bypass when the trigger gun is shut off. It releases water when
the trigger on the gun is pressed. The unloader valve is preset at the factory and
should not be adjusted.
BURNER – The burner heats the water in hot water pressure washers. It is located
in the coil and may be powered by propane, gas, or oil.
DEMA – High-pressure chemical injector.
BACK FLOW PREVENTER – Device to prevent flow backwards into potable
water supply.
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