pressure

hi little ? when i have the 10ft pole on i have my trolley at say no 17 and i get a good arc on the pencil jets ! then when i swap to the 25ft pole i have to turn it to about no 30 to get the same arc of water . i know its a bigger pole but should i really need to turn it up this much ??? thanks in advance

The arc of water,pressure will vary from 5 metre away from van to 100 metre away from van.i clean up to 36 ft n it noticeable from ground floor upto 3rd floor