Shape for a pressure washer fan nozzle

I bought the cheapest HF pressure washer. The nozzle is a straight jet
(which is plenty powerful for what I need) and to get a fan spray you
twist the end of the wand and two plates come together and pinch the
stream into a fan. The fan spray seems disproportionately underpowered.
I'd like to turn a fixed narrow nozzle for it in the hopes of preserving
more power with a wider footprint.
Any suggestions on what the shape should be?
Reply to
Ben Jackson
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I bought what sounds similar several years ago when a hardware chain went out of business. I left it in an unheated garage one winter and one of the brass pieces of the wand froze and split. I figured - no problem- just go get a replacement fitting at another hardware store. I took the wand parts to check, just to be sure.
Guess what? All the brass fittings were metric threaded! The whole washer was made in Italy. No metric threaded fittings in the whole Seattle area.
I was rather new to metalworking at the time, but had a small Prazi lathe with all the change gears. The instructions were clear enough about threading that let me actually make a replacement fitting. It's still there and working.
This story is just to warn you and perhaps others that the Chinese washers of today mey be copies of the Italian washer of 10 years ago!
Ben Jacks> I bought the cheapest HF pressure washer. The nozzle is a straight jet
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