Nozzle orifice size for roof pump?

This is what I use, thanks to @Racer.
1/2in Barb to thread
1/2 threaded pvc ball valve
18in 1/2in threaded pvc pipe
1/2in pvc female to female
1/2in male to 1/4in female brass reducer
1/4in quick connect for your nozzle


It can all be found at home Depot. The nozzles I use are 2540 and 0040. I have a 5.5gpm with 200ft hose. The more hose you use the less GPM you get but I wouldn’t roll with less than 200ft

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