Pressure Washer. Adjustable Water PSI ?

[427HISS]

I have a Briggs & Stratton 190
8.75 EXI
2600
RPM3100, PSI

Can I place a ball valve before the outlet (sprayer) so I can reduce the pressure of the spray for smaller items to large, without hurting the unit's pump ?

 

[The Cobbler]

pretty sure you run the risk of overheating the pump due to restricted water flow . that can quickly kill a pump

 

[American Locomotive]

Some pressure washers have an adjustable pressure regulator. But generally speaking, you just put a nozzle with a larger diameter orifice or a wider spray angle.

 

[rust in the eye]

I wouldn't use the ball valve to throttle the output for the reason cobbler mentions. You will be restricting volume, not pressure.
If you were to install it on a T so the excess is discharged then I see no harm.
Not sure how well the typical ball valve will like 3000+ psi.
Have you investigated different tips?

 

[Shiftless]

Have you investigated different tips?

Different spray patterns make a huge difference. Zero degree needle spray can do serious damage to a surface. Wide fan is MUCH safer but of course much less aggressive cleaning,

 

[YesIHaveAHammer]

As I understand it, electronically variable pressure washers reduce the pump speed, and valve variable ones use a bypass/recirculation valve. Both methods also reduce flow volume.

Your ball valve would act as a restrictor, which is effectively what different nozzles do. A given washer module will have a range of acceptable nozzles - too small will make it work too hard, too big (or none) will make it run too fast. So your ball valve would need to be set corresponding within this range, which could probably be worked out by measuring volumes, but is a lot of hassle.

 

[yatg]

Just wash the item from farther back. More distance, less effective pressure on the item. Get a pistol gun for better control.

 

[MileHighRover]

Nozzle size is the correct way to reduce pressure.