I just used a 2' pvc wand with a 45* on the tip, with a 3/4 ball valve and it works good. but i will use a shorter wand next time. I run the fatboy and if you dont want to restrict flow
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X- treme Klean Professional Powerwashing Solutions South Padre Island - McAllen TX.
I've always run a ball valve. On the 5850, I had no problems using it to regulate the flow. Worked great. The FatBoy however draws more amps, and the ball valve will need to be all the way open or shut.
It sounds like 12 volt systems need the ball valve wide open to work properly. Lets hear some input from someone that has an air pump. I am still trying to decide which way to go and it would be nice to control over spray by only partially opening the valve.