Whats the best way to index an anti-siphon tube?
Make sure that the tip of the anti-siphon tube is as close to the wall of the tank as possible. Also, it is usually best to crimp the tip of the tube in order to reduce the passage of liquid. Here, we use 1/8″ OD copper tubing and crimp down, or flatten, the end of the tubing around a .025 piece of wire (a small paper clip will do). Then pull out the wire to leave a .025 air passage into the tube. You may think .025 is too small to get enough air but I can assure you that it is more than enough and it really helps with consistency. My own gun is fed entirely through a .014 air passage. My first and still my favorite semi (now over six years old) gets it’s entire air supply through the air passage in a stock Nelspot piercing pin, .010.
