Tap, tap, tap, how is it that I get vacuum after 2 sap ladders, an 8' lift and a 11' lift when at my releaser I have 27" and at the end of the mainline I have 25-26" and at my end tap I get 24"?
I am using spider type ladders using 5/16 tubing. I have 1 leg for each 15 taps or part there of. For example I have 3 legs on one having 41 taps. On both mains I have a micro leak set up to help the flow climb, but only on the farthest out sap ladder. The ladder closer to the releaser doesn't get one because it got a tiny amount of air at the farthest ladder. To run my micro leaks, I have a little needle valve and it gets opened just until I can hear air flow when I have my CDL leak finder. I just looked it up and was going to link it here, but it turns out CDL no longer offers them.
Speaking of my leak finder, I had a leak at the releaser last year but couldn't find it, until I used my CDL leak finder. It was easily found and very obvious even though the vacuum pump was 4' away and that is quite loud.