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What Are All These Terms?

Adjustable Spray Wand - Some models are equipped with an adjustable spray wand that you can adjust the spray angle by turning the tip.


Automatic Cool Down System (Thermal Relief) - Cycles water through pump when water reaches 125 - 155 degrees F. Warm water will discharge from pump onto ground. This system prevents internal pump damage.


Axial Cam - A device (cam) used to transform the rotary motion of the motor/engine into the reciprocating motion of a pump's pistons.


Detergent Injection System - Cleaning detergents are drawn into water stream to make cleaning more effective by allowing detergents to saturate the soiled surface.


GPM - A unit of measure for water flow, same as "gallons per minute."


High Pressure Outlet - Connection for high pressure hose.


HP - Same as horsepower, a unit of measure for work.


OHV - Same as "overhead valve", an improved way to control exhaust and intake valves on internal combustion engines.


PSI - A unit of pressure, same as "pounds per square inch."


Purge - A method of eliminating air from a pressure washer so that starting the engine is easier.


PW - Same as "pressure washer."


RPM - Same as "revolutions per minute." The amount of revolutions (turns) an engine makes in one minute.


Side Valve - A type of internal combustion engine that uses a conventional "L" type cylinder head with the exhaust and intake valves on the side of the engine.


Spray Gun - Controls the application of water onto the cleaning surface with a trigger.


Thermal Relief - A technique use to reduce the build-up of high temperature water within a pressure washer pump caused when the spray gun trigger is closed.


Turbo Nozzle - A device used to increase the effectiveness of high-pressure water, by spinning a narrow stream of water in a circle at a high speed.


Unloader - A device used to relieve the water pressure within the pump whenever spray flow is blocked.


Variable Pressure Control - A pressure washer feature that adjusts the water pressure to the specific cleaning task.

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