Tuk50 your going to have to put one hole at the last fartest end of the pipe and put a guage on the end of the pipe.
You had best get a gauge the reads ounces up to 2 pounds if they have such a thing.
Close the hole and check the pressure open the hole and check the pressure.
The amount that you lose will be your K factor including psi and friction loss per hole.
So let’s say you lost I ounce and you had 2 pounds you would then only have16 holes before you had your minimum pressure of 1 psi.
If you don’t have a drill press you will break a lot of 1/32 bits doing it by hand.
The smallest common drill bit size is 1/16 in most stores.
Worth
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