I made this fertirrigation system wiht a 3/4" venturi in a by pass, the caming pipe is 1.5" and the final one 1". It allouds me to put 90 litters per hour in a 1700 l/h flow, but playing with the by pass, even 2000 l/h can pass away. After it came the electrovalbs wich drives the water to one central fine sprinkler for misting and 16 spray prinklers for irrigation.