
CU: Cleaning Units. GPM multiplied by PSI. GPM x PSI = CU. 7- ENG A04032 PRESSURE WASHER PRESSURE WASHER TERMINOLOGY (cont'd) OPERATING FEATURES PRESSURE WASHER TERMINOLOGY (cont'd) OPERATING FEATURES Bypass Mode: Allows water to re-circulate within pump when the gun trigger is not pulled. Allowing the unit to run for more than two minutes without the gun trigger pulled could cause overheating and damage to the pump. Chemical Injection System: Mixes cleaners or cleaning solvents with the water t