looking for a water saving water nozzle with plenty of pressure any clue where to find one

You won't get more pressure, but what you'll get is the available pressure concentrated. Find a nozzle like this, and attach it to a good quality gun-type water sprayer that has a threaded end on it. then you have good control over on-off, and can take the jet nozzle off for when you don't want the high-intensity spray.

you will get one from schwing, they do a twist nozzle you can spray and have a jet and save water

I use the same one as Pumpjock. Works good, last long time.

Gilmour Zinc Hose Nozzle, Large.

This one has always been the best for me.  ONLY get the all metal version...for some reason, any plastic versions don't work nearly as well.  Will handle 150+ psi..from experience.

No matter what nozzle you use, it really comes down to the way you wash out.  I figured out I would use LESS water with a higher pressure during washout.  I also learned a lot of tricks about pumping the hopper down, letting ready mix drivers washout into the hopper while folding up, etc. 

Try some stuff when you get on a jobsite that doesn't mind the mess and figure some things out before you get to the washout...it's fun making a mess when you can!

Tell your boss to buy a highpressuer-washer , you operate a pump for many many dollars.....

I was plundering in a old hardware store and ran across them metal pistol nozzles and to my surprise it was made in the USA so I bought all they had (10) good investment.

if you got an oiler have him rinse the screen every 3 or 4 trucks, if not do it yourself, ohh and presoak the screen and hopper w/a good biodegradable,oily substance before you leave the yard in the morning( diesel and veg. oil works well for me) and most important tarp it up.

good luck ;)