Benchmark BW4400, User Manual, Page: 19 / 110

12
BW SERIES
3.6 CHECK THE COLD WATER SUPPLY
Check local regulations of your municipal water company to check if
a backflow prevention device is required when hooking up to drinking
water. This ensures no feedback of chemicals will return to the water
supply. Use a water filter to avoid potential damage from dirt in the water
supply.
Garden hose must be at least 3/4" diameter
Flow rate of water must not fall below 8.0GPM
Flow rate can be determined by running hose into an empty 5 gallon pail
for 1 minute
The water supply temperature must not exceed 40°C/104°F
Never use the pressure washer to draw in water contaminated with
solvents eg. paint thinners, gasoline, oil etc.
Always prevent debris from being drawn into the unit by using a clean
water source and additional water filter.
DO NOT operate pressure washer without the water turned on.
3.7 ASSEMBLE THE SPRAY GUN AND HOSES
DANGER!
NEVER direct the water flow at people. The high pressure jet can be
dangerous if misused and must not be directed at people, animals,
electrical devices or the unit itself. DO NOT TREAT FLUID INJECTION AS
A SIMPLE CUT! Seek medical help immediately.
1. Rotate the coupler on the trigger handle assembly clockwise to tighten the
spray wand. Tighten by hand.