Hi, I am starting to plan my herms coil and I intend to use a 20m roll of 10mm copper. I am pretty confident in the coiling part but I am a bit confused as the best way to connect it to my HLT, I was thinking of drilling holes just big enough to take the 10mm side of a 10-15mm brass coupler. My issue is how am I then to go about creating a seal that leaves enough of the thread for the 10mm compression fitting to be secured to the coil?
Any help with this or maybe ideas on a better way to go about it would be brill!
Thanks
Brett