Here is a manifold system, albeit a gas manifold, but the theory is the same. Flow is from right to left. The manifold starts after the regulator (or pump in your case). This would be considered a 1" manifold. The first tee is 1" x 3/4" and goes to the furnace. The second tee is 1" x 3/4" again and goes to the range. 3rd tee is 1" x 3/4" x 1/2" with the 1/2" going to the water heater. The end of the manifold on the left carries on in 3/4" to the BBQ and fire pit on the deck. Just out of frame on the left is a 3/4" union and as you can see there is a 1" union just before the reg. The theory is the same for plumbing just utilizing different materials.
http://farm3.staticflickr.com/2867/1...89b370666e.jpg

I will draft something up for you tomorrow that you can work from that might help.

Ok this is how I would do it, not saying its right but this is my way. Not sure why you need 2 - 3/4" feeds to the UV but if you only need one feed forget the tee and switch the bushing to a coupler and a straight barb like the other 2 lines. For expansion, leave the cap at the top high enough so you can cut it off and add in another tee.

http://i765.photobucket.com/albums/x...ps8nr26zqb.jpg

This bear can plumb... +1.

Thank you Grizz!

Just what I needed.

I have had some practice.

No problem, shoot me a pm if you have a question.