Ok i have been working on a home brew coolant mister system...I thought i was all finished but I ran into a problem...the small siphon hole doesn't siphon it blows air out...I thought it was a pretty simple deal but apparently not...made the large straight through bore 5/16" using a regular air hose coming in and a 5/16" plastic airline going out to the nozzle... the siphon hole intersecting at 90 degrees is much smaller...maybe 1/8". this didnt work so i blocked off the 90 degree hole and drilled one that intersected at 45 degrees...same result.

any advice would be helpful.