I think you technically want a 1.25" hole for heating elements. That's about how wide my holes were when I installed my 4 elements. Did you try and the hole is way too big? If it is, use a reducing coupler as was suggested. McMaster/Grainer ought to have them.
Den Faaborg Bryggeri
Originally Posted by davekippen
Open log Fermenting and gas-can secondary?? I am planning my next brew right now!!