Originally Posted by kevin509
If you haven't welded a ferrule yet you need to consider the type of element so it doesn't touch the ferrule on the kettle which can be common with the 1-1/2" ferrule and fold back elements. You need at least 1/2" projection from the kettle with the ferrule in order to get a clamp on it. The short ferrules are usually used to weld on to a tube but can be used on the side of a kettle. They are easier to silver solder on than weld because of how short they are.
I ordered the long type ferrule from brewers hardware this morning and it sounds like the right decision(although its hard to tell from your response you make it sound like no fold back elements will fit a 1.5" ferrule).
I figured the fold back elements would fit fine since it fits in the 1.5" RIMS tube from brewers hardware.
However I have no real world experience are you saying the 1.5" long ferrule won't work with standard fold back elements? I realize the ripple elements won't work. Will the long 1.5" ferrule welded in the side of a brew kettle work with fold back elements? If not someone please let me know asap so i can try to adjust my order.