Thought I would share my build. I don't have any pictures of it, just this video I took that shows everything:
I'll give a brief parts list of the things besides the PVC since that is a build to suit your needs type of idea.
3/5 Pump from Harbor Freight. The box lists it at 21 PSI, while the other pumps including more powerful pumps were less than 10 PSI. The pressure in the video appears to be good.
McMaster plastic sprayball:
This looks to be a really good item and worth the $50 for it.
I'm using 1" PVC for the base, and then there was a reducer I found to get me to 1/2" thread so I had to bought a 1/2 to 1/4" adapter to fit the correct size barb connection. There may be a better way to do it, but it made sense to me.
The pump has a 1 1/4 hook up so I had to convert it down to 1" with a reducer. The part that goes up from the 4 way split is 1/2" PVC as the sprayball is 1/2 and it was easy to get a threaded adapter for it at home depot.
One thing to note about the pump, it says only rated to 77 degrees. It appears most people push these type of pumps well beyond that to temperatures that people use to clean with and looks to hold up just fine. In fact, I purchased the warranty from them which replaces the unit no matter what. He even said I could go drive over it with my car and still bring it back in.
I feel comfortable with that to see how this does.