A food grade solution would be weld it or have someone you know weld it. Welding is food grade and it wont leach into your sap. Tig welding is the best but someone who is good with a mig could so it. Stick welding is out of the question. My dads friend who is amazing with a tig welder welded a half dozen pin holes in my english tin flue pan. Just a warning english tin is one of the hardest metals to weld but im pretty sure your talking about a stainless steel bulk tank.
02 F350 powerstroke and 89 Toyota 4X4 5 speed sap haulers
16X16 sugar shack
30"X8' raised flue GH Grimm evaporator Smoky Lake Maple front pan!
Sthil MS 460, 026 (2), 009, husky 61, 365, 272, and a 42
2009 41 taps, 2010 72 taps on a barrel evapotator all buckets, 2011 151 taps 34 buckets 117 taps on tubing.