Not necessarily unsafe but when positioning my lower element on an old Budweiser keg I went 10mm to low and broke the original weld seam. Never noticed until I filled it up to test and seen the leak. I'd researched enough but never seen anything about it and I was trying to keep the element close enough to the bottom.
Easy fix, cut out what I'd welded in and I fused the gaps with a Tig welder but for those without it might not be so simple.
Element position on keg
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