[Cardsfan871]

I do a lot of DIY. I also do a lot of "tinkering" with small engine equipment(lawnmowers, weedeaters, ect.). I'm thinking of buying a small parts washer. Don't have a lot of money to play with so my budget is low.
Many of the smaller washers that have higher customer ratings usually have the same complaint. Too much pressure from the pump and no way to adjust.
Trying to plan ahead before making a purchase, I thought about a valve to regulate the flow but fear it might create too much back pressure and harm the pump.
I'm thinking it might be better to regulate the power to the pump similar to a dimmer switch on lighting.
Any thoughts or suggestions on this?

 

[joecaption]

A simple cheap ball valve will work and have no effect on the pump.

 

[psgama]

Bypass valve. Don't just pinch the flow off, bypass the discharge back to the suction of the pump, this will lower the pressure to the washer.